101112

Appears in sequences

• Decimal concatenation of n, n+1, and n+2.at n=10A001703
• Number of steps to compute n-th prime in PRIMEGAME (fast version).at n=12A007546
• Smallest multiple of n in which the most significant occurrence of the digit string of n is preceded and followed by the digit string of (n-1) and (n+1) as can be seen in the forward concatenation of the natural numbers.at n=10A078294
• a(n+1) is the least positive integer k such that (1) k is a one-digit number or the concatenation of two or more consecutive numbers; (2) |k-a(n)| is prime; (3) k is not already in the sequence; and (4) |k-a(n)| is not the absolute difference of two previous consecutive members of the sequence.at n=34A090910
• Concatenate the consecutive increasing numbers starting with Harshad(n) and ending with Harshad(n+1).at n=9A112131
• Duplicate of A001703.at n=10A127422
• Number of 0..7 arrays x(0..n) of n+1 elements with zero n-1st differences.at n=11A200081
• Concatenate (3n-2,3n-1,3n).at n=3A248556
• Consider numbers n = concat(w,x,y,z) such that w*x*y*z | n. Leading zeros in x, y and z allowed. Sequence lists numbers that admit at least two such concatenations.at n=9A257172
• Poincaré series for hyperbolic reflection group with Coxeter diagram shown in Comments.at n=25A265049
• Partial sums of A294629.at n=47A294630
• Numbers that, for some x, are the concatenation of x, x+1 and x+2 and are divisible by at least two of x, x+1 and x+2.at n=5A306643