A061964 Numbers n such that n divides the (left) concatenation of all numbers <= n written in base 11 (most significant digit on right).

1, 5, 20, 140, 3400, 6008, 9160, 24655, 26265, 58671, 151496, 265500, 535860, 806445, 926620, 990195, 2675580, 7153175

Offset

1,2

Comments

This sequence differs from A029528 in that all least significant zeros are kept during concatenation.

No more terms < 10^7.

Links

Table of n, a(n) for n=1..18.

Index entries for related sequences

Example

See A061955 for example.

Mathematica

b = 11; c = {}; Select[Range[10^4], Divisible[FromDigits[
c = Join[Reverse[IntegerDigits[#, b]], c], b], #] &] (* Robert Price, Mar 09 2020 *)

Crossrefs

Cf. A029447-A029470, A029471-A029494, A029495-A029518, A029519-A029542, A061931-A061954, A061955-A061978.

Sequence in context: A337292 A024066 A009569 * A133667 A354848 A318433

Adjacent sequences: A061961 A061962 A061963 * A061965 A061966 A061967

Keyword

nonn,base,more

Author

Larry Reeves (larryr(AT)acm.org), May 24 2001

Extensions

Edited and updated by Larry Reeves (larryr(AT)acm.org), Apr 12 2002; Aug 25, 2002

a(14)-a(18) from Lars Blomberg, Aug 18 2011

Status

approved