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A029505 Numbers n such that n divides the (right) concatenation of all numbers <= n written in base 12 (most significant digit on right). 1

%I #18 Mar 12 2020 21:19:24

%S 1,2,3,4,6,11,106,616,990,1232,1276,1534,3494,8140,43054,52634,97691,

%T 99280,131846,136006,355877,617749,824703,2115058,3011987

%N Numbers n such that n divides the (right) concatenation of all numbers <= n written in base 12 (most significant digit on right).

%C This sequence differs from A061941 in that all least significant zeros are kept during concatenation.

%C No more terms < 10^7. - _Lars Blomberg_, Oct 07 2011

%H <a href="/index/N#concat">Index entries for related sequences</a>

%e See A029495 for example.

%t b = 12; c = {}; Select[Range[10^4], Divisible[FromDigits[c = Join[c, Reverse[IntegerDigits[#, b]]], b], #] &] (* _Robert Price_, Mar 12 2020 *)

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

%K nonn,base,more

%O 1,2

%A _Olivier GĂ©rard_

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

%E Additional comments and more terms from Larry Reeves (larryr(AT)acm.org), Jun 05 2001

%E a(22)-a(25) from _Lars Blomberg_, Oct 07 2011

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Last modified March 29 00:26 EDT 2024. Contains 371264 sequences. (Running on oeis4.)