12345678

Appears in sequences

• Triangle of the gods: to get a(n), concatenate the decimal numbers 1,2,3,...,n.at n=7A007908
• a(0) = 0; for n>0, a(n) = 10*a(n-1) + n.at n=8A014824
• Smallest number that contains the numbers from 1 to n as substrings.at n=7A035239
• Concatenate next digit at right hand end (where the next digit after 9 is again 0).at n=8A057137
• String together the first n numbers in an order which minimizes the result.at n=7A060555
• Smallest number that begins with 1, has digits in order 123...901... and is divisible by n. If no such number exists then a(n) = 0.at n=8A061074
• Smallest number that begins with 1, has digits in order 123...901... and is divisible by n. If no such number exists then a(n) = 0.at n=17A061074
• Smallest number that has digits in order ...123...901... and is divisible by n. If no such number exists then a(n) = 0.at n=46A061805
• Partition the concatenation 1234567...of natural numbers into successive strings which are multiples of 9, all different and > 9. (0 never taken as the most significant digit.)at n=0A077302
• In the following triangle the n-th row contains n n-digit (or (n-1)-digit) numbers whose concatenation (with a 0 prefixed for (n-1)-digit numbers) gives a substring of the cyclic concatenation of 1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,...: 1; 12 34; 123 456 789; 1234 5678 9012 3456; 12345 67890 12345 67890 12345; ... Sequence contains the triangle by rows.at n=28A078194
• Numbers with digits in ascending order that differ exactly by 1.at n=42A138141
• Concatenation of the reversed digits of numbers from 1 to n.at n=7A138957
• Generalized Pascal Triangle - satisfying the same recurrence as Pascal's triangle, but with a(n,0)=1 and a(n,n)=10^n (instead of both being 1).at n=52A164844
• Smallest multiple of 3 such that decimals digits 1, ..., k (k = 1, ..., 9) and 0 appear in any order.at n=7A178341
• Permutations of 12345678: Numbers having each of the decimal digits 1..8 exactly once, and no other digit.at n=0A178478
• Nonzero digits not used in n.at n=9A180408
• Triangle T(n,k) read by rows: Substring of k digits of sequence A007376, ending at position n, 1 <= k <= n.at n=35A224841
• a(n) is the concatenation of first n terms of A033307.at n=7A252043
• Concatenation of the numbers from 1 to n but omitting 9.at n=7A262579
• Concatenation of the numbers from 1 to n but omitting 10.at n=7A262580