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Numbers k that divide the (right) concatenation of all numbers <= k written in base 25 (most significant digit on left).
142

%I #12 Jul 04 2021 01:58:15

%S 1,3,5,9,15,21,25,35,64,75,125,192,320,345,375,625,675,825,875,945,

%T 960,1117,1125,1155,1255,1344,1375,1485,1575,1600,1728,1875,1925,2240,

%U 2475,2625,2880,3125,3375,3465,3520,4032,4065,4125,4375,4725,4800,5625,5775

%N Numbers k that divide the (right) concatenation of all numbers <= k written in base 25 (most significant digit on left).

%H Robert Price, <a href="/A029470/b029470.txt">Table of n, a(n) for n = 1..89</a>

%t b = 25; c = {}; Select[Range[10^5], Divisible[FromDigits[c = Join[c, IntegerDigits[#, b]], b], #] &] (* _Robert Price_, Mar 11 2020 *)

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

%K nonn,base

%O 1,2

%A _Olivier Gérard_

%E More terms from Larry Reeves (larryr(AT)acm.org), May 02 2001