23456

Appears in sequences

• Lengths increase by 1, digits cycle through positive digits.at n=4A007923
• a(n) = Sum_{k=0..n-2} T(n,k) * T(n,k+2), with T given by A026648.at n=6A026973
• Numbers in which each digit is the (immediate) successor of the previous one (if it exists) and 0 is considered the successor of 9.at n=38A059043
• Let N = 123456789123456789123456789..., with the digits from 1 to 9 repeated indefinitely. Then a(n) is the n-digit number formed from the digits starting at the {n(n-1)/2 +1}-th position of N, read backwards if n is even.at n=4A066580
• Triangle read by rows in which the n-th row contains the n numbers in increasing order formed by the concatenation of first n-1 numbers. (The digits of the numbers with 2 or more digits are taken as one entity.) First row is taken to be 0.at n=20A081539
• Smallest available integer which fits into the repeating pattern 0123456789.at n=39A098755
• Records in the sequence A024573 defined by [1/{n*e}], {x} := x - [x].at n=14A101262
• Integers are written in the form abcd...n where "a" means "At position a in this integer there is a digit b"; "b" means: "at position b there is a digit c"; "c" means: "at position c there is a digit d"; ... and "n" means nothing. No repetitions are allowed (like in the integer 111).at n=43A105958
• Slowest increasing sequence with its first 10 digits all different one from another, then the next 10, then the next 10, etc.at n=28A106604
• Partial sums of A120769.at n=44A120770
• Numbers with digits in ascending order that differ exactly by 1.at n=31A138141
• Number of lines through at least 2 points of a 10 X n grid of points.at n=32A160850
• Composites with consecutive (ascending) digits.at n=28A161760
• a(n) is the smallest number not already in the sequence, such that the concatenation of all a(n) displays the periodic digit string 1, 2, 3, 4, 5, 6 (and repeat).at n=29A165304
• a(n) is the smallest number not yet in the sequence such that the concatenation of all terms yields a periodic stream of digits 1, 2, 3, ..., 7 (repeat from 1).at n=31A165305
• a(n) is the smallest number not yet in the sequence such that concatenation of all terms yields an infinite periodic stream of digits 1, 2, 3, ..., 8 (repeat from 1).at n=37A165306
• Minimum number n, not already present, that permits the cyclic repetition of the decimal digits 1,2,3,4,5,6,7,8,9 in the sequence.at n=38A165307
• Append three digits, each increasing by one modulo 10 from the last digit of the nonnegative integers. 0 -> 123, 1 -> 1234 2 -> 2345, ... , 9 -> 9012, 10 -> 10123, etc.at n=23A167231
• Put the natural numbers together without spaces and read them five at a time advancing one space each time.at n=1A193493
• Array with a variable number of columns, where terms in the n-th row are the differences (computed in decimal base and divided by 9) between equal ratio permutations, found in the base n>=2, and the first (in ascending order of digits) minimal value permutation of {0,1,...,n}.at n=29A212958