A061966 Numbers n such that n divides the (left) concatenation of all numbers <= n written in base 13 (most significant digit on right).

1, 3, 9, 15, 16, 33, 285, 867, 5683, 14205, 21075, 27120, 31403, 388601, 1037577, 1246064

Offset

1,2

Comments

This sequence differs from A029530 in that all least significant zeros are kept during concatenation.

No more terms < 10^7. [Lars Blomberg, Aug 15 2011]

Links

Table of n, a(n) for n=1..16.

Index entries for related sequences

Example

See A061955 for example.

Mathematica

b = 13; 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: A090158 A030342 A273323 * A085328 A291347 A062220

Adjacent sequences: A061963 A061964 A061965 * A061967 A061968 A061969

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

a(15)-a(16) from Lars Blomberg, Aug 15 2011

Status

approved