A029513 Numbers n such that n divides the (right) concatenation of all numbers <= n written in base 20 (most significant digit on right).

1, 2, 4, 5, 6, 10, 12, 14, 18, 19, 53, 703, 1824, 2185, 2546, 5054, 6594, 9841, 1393056, 1648110, 1984492, 2648114, 3430811, 8070122

Offset

1,2

Comments

This sequence differs from A061949 in that all least significant zeros are kept during concatenation.

No more terms < 10^7. [Lars Blomberg, Oct 14 2011]

Links

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

Index entries for related sequences

Example

See A029495 for example.

Mathematica

b = 20; c = {}; Select[Range[10^4], Divisible[FromDigits[c = Join[c, Reverse[IntegerDigits[#, b]]], b], #] &] (* Robert Price, Mar 13 2020 *)

Crossrefs

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

Sequence in context: A287332 A029465 A014871 * A061949 A233413 A128167

Adjacent sequences: A029510 A029511 A029512 * A029514 A029515 A029516

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(19)-a(24) from Lars Blomberg, Oct 14 2011

Status

approved