A029500 Numbers n such that n divides the (right) concatenation of all numbers <= n written in base 7 (most significant digit on right).

1, 3, 11, 16, 48, 480, 947, 1111, 1137, 1367, 2125, 6351, 6841, 8209, 11392, 32931, 166413, 173904, 263547, 284047, 634832, 690589, 2495931, 6696245, 7004640

Offset

1,2

Comments

This sequence differs from A061936 in that all least significant zeros are kept during concatenation.

No more terms < 10^7. - Lars Blomberg, Oct 03 2011

Links

Table of n, a(n) for n=1..25.

Index entries for related sequences

Example

See A029495 for example.

Mathematica

b = 7; c = {}; Select[Range[10^4], Divisible[FromDigits[c = Join[c, Reverse[IntegerDigits[#, b]]], b], #] &] (* Robert Price, Mar 12 2020 *)

Crossrefs

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

Sequence in context: A030765 A198515 A035337 * A243770 A298701 A216911

Adjacent sequences: A029497 A029498 A029499 * A029501 A029502 A029503

Keyword

nonn,base,more

Author

Olivier Gérard

Extensions

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

Additional comments and more terms from Larry Reeves (larryr(AT)acm.org), May 25 2001

a(21)-a(25) from Lars Blomberg, Oct 03 2011

Status

approved