A061970 Numbers n such that n divides the (left) concatenation of all numbers <= n written in base 17 (most significant digit on right).

1, 25, 64, 67, 1477, 118531, 421353, 573333, 799155

Offset

1,2

Comments

This sequence differs from A029534 in that all least significant zeros are kept during concatenation.

No more terms < 8*10^6.

Links

Table of n, a(n) for n=1..9.

Index entries for related sequences

Example

See A061955 for example.

Mathematica

b = 17; c = {}; Select[Range[10^4], Divisible[FromDigits[c = Join[Reverse[IntegerDigits[#, b]], c], b], #] &] (* Robert Price, Mar 09 2020 *)

Crossrefs

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

Sequence in context: A251688 A211326 A103645 * A159008 A183373 A354381

Adjacent sequences: A061967 A061968 A061969 * A061971 A061972 A061973

Keyword

nonn,base,more

Author

Larry Reeves (larryr(AT)acm.org), May 24 2001

Extensions

Edited and updated by Larry Reeves (larryr(AT)acm.org), Apr 12 2002; Aug 25, 2002

a(9) from Lars Blomberg, Aug 04 2011

Status

approved