A029473 Numbers k that divide the (left) concatenation of all numbers <= k written in base 4 (most significant digit on left).

1, 3, 17, 19, 29, 99, 117, 141, 183, 7011, 11607, 49417, 28648531, 43515891, 3103126707

Offset

1,2

Comments

No other terms below 3*10^10.

Links

Table of n, a(n) for n=1..15.

Index entries for related sequences

Mathematica

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

Crossrefs

Cf. A007090.

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

Sequence in context: A019342 A340408 A339544 * A103088 A226925 A259772

Adjacent sequences: A029470 A029471 A029472 * A029474 A029475 A029476

Keyword

nonn,base,more

Author

Olivier Gérard

Extensions

7011 from Andrew Gacek (andrew(AT)dgi.net), Feb 20 2000

More terms from Larry Reeves (larryr(AT)acm.org), Jun 01 2001

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

a(13)-a(14) from Max Alekseyev, May 13 2011

a(15) from Jason Yuen, May 13 2024

Status

approved