A014181 Numbers > 9 with all digits the same.

11, 22, 33, 44, 55, 66, 77, 88, 99, 111, 222, 333, 444, 555, 666, 777, 888, 999, 1111, 2222, 3333, 4444, 5555, 6666, 7777, 8888, 9999, 11111, 22222, 33333, 44444, 55555, 66666, 77777, 88888, 99999, 111111, 222222, 333333, 444444, 555555, 666666, 777777, 888888

Offset: 1

Author

N. J. A. Sloane

Keywords

• nonn
• base

Comments

Original definition: Numbers in which all digits are repeated. (This would also include all terms of A033023 (e.g., 1100, 1122, ...) and maybe also 1010, 1212, etc.) - M. F. Hasler, Jun 24 2016

Links

• Index entries for linear recurrences with constant coefficients, signature (0, 0, 0, 0, 0, 0, 0, 0, 11, 0, 0, 0, 0, 0, 0, 0, 0, -10).

Crossrefs

Same as A010785 except for one-digit numbers.

Programs

Mathematica

Table[Map[FromDigits@ Table[#, k] &, Range@ 9], {k, 2, 6}] // Flatten (* Michael De Vlieger, Jun 24 2016 *)

PARI

A014181(n)=10^((n+17)\9)\9*((n-1)%9+1) \\ See A010785 for a nxt() function. - M. F. Hasler, Jun 24 2016

Extensions

Better definition and offset changed to 1 by M. F. Hasler, Jun 24 2016