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A061969 Numbers n such that n divides the (left) concatenation of all numbers <= n written in base 16 (most significant digit on right). 1
1, 3, 5, 9, 15, 25, 41, 1149, 1755, 2009, 2815, 6981, 19117, 65515, 218715, 315735, 405845, 1511139, 2165055, 7076685 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

This sequence differs from A029533 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..20.

Index entries for related sequences

EXAMPLE

See A061955 for example.

MATHEMATICA

b = 16; 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: A001595 A092369 A298340 * A034084 A018342 A029485

Adjacent sequences:  A061966 A061967 A061968 * A061970 A061971 A061972

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

a(18)-a(20) from Lars Blomberg, Aug 06 2011

STATUS

approved

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Last modified May 24 19:14 EDT 2020. Contains 334580 sequences. (Running on oeis4.)