A029497 Numbers k such that k divides the (right) concatenation of all numbers <= k written in base 4 (most significant digit on right).

1, 2, 3, 11, 207, 1239, 7947, 9233, 49883, 118669, 315629, 2640670

Offset

1,2

Comments

This sequence differs from A061933 in that all least significant zeros are kept during concatenation.

a(13) exceeds 10000000. - Sean A. Irvine, Sep 01 2009

Links

Table of n, a(n) for n=1..12.

Index entries for related sequences

Example

See A029495 for example.

Mathematica

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

Crossrefs

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

Sequence in context: A273598 A135161 A066100 * A318130 A109809 A211349

Adjacent sequences: A029494 A029495 A029496 * A029498 A029499 A029500

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), May 25 2001

a(12) from Sean A. Irvine, Sep 01 2009

Status

approved