A029542 Numbers k such that k divides the (left) concatenation of all numbers <= k written in base 25 (most significant digit on right).

1, 3, 9, 21, 27, 48, 144, 352, 361, 4672, 5904, 7392, 15323, 25488, 32096, 55491, 71712, 89259, 101437, 139776, 752011, 2215168, 5082544, 6766761

Offset

1,2

Comments

This sequence differs from A061978 in that all least significant zeros are removed before concatenation.

No more terms < 10^7. - Lars Blomberg, Oct 01 2011

Links

Table of n, a(n) for n=1..24.

Index entries for related sequences

Example

See A029519 for example.

Mathematica

b = 25; c = {}; Select[Range[10^4], Divisible[FromDigits[c = Join[IntegerDigits[ IntegerReverse[ #, b], b], c], b], #] &] (* Robert Price, Mar 13 2020 *)

Crossrefs

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

Sequence in context: A275450 A244972 A044055 * A014962 A014945 A045590

Adjacent sequences: A029539 A029540 A029541 * A029543 A029544 A029545

Keyword

nonn,base,more

Author

Olivier Gérard

Extensions

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

Additional comments and more terms from Larry Reeves (larryr(AT)acm.org), Jun 04 2001

a(21)-a(24) from Lars Blomberg, Oct 01 2011

Status

approved