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 A029490 Numbers k that divide the (left) concatenation of all numbers <= k written in base 21 (most significant digit on left). 0
 1, 5, 25, 43, 55, 128, 275, 1280, 2816, 5888, 6400, 12800, 28160, 33413, 37376, 129919, 140800, 286025, 352000, 990845, 1050880, 1773725, 2848000, 3581033, 4343680, 4428160, 5624960, 6732160, 7553920, 8497280, 9249995, 9872000, 10938752, 11426176, 14558575, 14569600, 15368320, 18998705, 19312000, 21362275, 24208000, 24934855, 27632000, 32432000, 37022605, 43193216, 51382265, 53717375, 81016375 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Table of n, a(n) for n=1..49. Index entries for related sequences MATHEMATICA b = 21; c = {}; Select[Range[10^4], Divisible[FromDigits[c = Join[IntegerDigits[#, b], c], b], #] &] (* Robert Price, Mar 12 2020 *) CROSSREFS Cf. A029447-A029470, A029471-A029494, A029495-A029518, A029519-A029542, A061931-A061954, A061955-A061978. Sequence in context: A293571 A294256 A056872 * A223654 A362092 A098947 Adjacent sequences: A029487 A029488 A029489 * A029491 A029492 A029493 KEYWORD nonn,base AUTHOR Olivier Gérard EXTENSIONS More terms from Andrew Gacek (andrew(AT)dgi.net), Feb 21 2000 More terms from Larry Reeves (larryr(AT)acm.org), May 24 2001 Edited and updated by Larry Reeves (larryr(AT)acm.org), Apr 12 2002 Thirty more terms from Max Alekseyev, May 15 2011 STATUS approved

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Last modified February 24 14:24 EST 2024. Contains 370304 sequences. (Running on oeis4.)