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A029507 Numbers n such that n divides the (right) concatenation of all numbers <= n written in base 14 (most significant digit on right). 1

%I #18 Mar 13 2020 11:27:34

%S 1,2,6,7,10,13,86,197,408,498,520,936,1362,1636,1716,1980,2392,6718,

%T 7709,17498,89190,100463,120133,168169,177840,477984,493806,2648444,

%U 3922637,5012137

%N Numbers n such that n divides the (right) concatenation of all numbers <= n written in base 14 (most significant digit on right).

%C This sequence differs from A061943 in that all least significant zeros are kept during concatenation.

%C No more terms < 10^7. [_Lars Blomberg_, Oct 08 2011]

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

%e See A029495 for example.

%t b = 14; c = {}; Select[Range[10^4], Divisible[FromDigits[c = Join[c, Reverse[IntegerDigits[#, b]]], b], #] &] (* _Robert Price_, Mar 13 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), May 25 2001

%E a(26)-a(30) from _Lars Blomberg_, Oct 08 2011

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Last modified April 24 11:49 EDT 2024. Contains 371936 sequences. (Running on oeis4.)