OFFSET
1,2
COMMENTS
This sequence differs from A061955 in that all least significant zeros are removed before concatenation.
No more terms < 10^7. - Lars Blomberg, Aug 31 2011
EXAMPLE
7 is in the sequence as the left concatenation of numbers <= 7 is 7654321 which gives 7654321 -> (111)(011)(101)(001)(11)(01)(1) base 2 -> 1111110111111_2 = 8127, and 7 divides 8127.
MATHEMATICA
b = 2; c = {}; Select[Range[10^4], Divisible[FromDigits[c = Join[IntegerDigits[IntegerReverse[#, b], b], c], b], #] &] (* Robert Price, Mar 13 2020 *)
PROG
(J) mkcat =: 13 : 'y +. #. ; #:&.> |.&.#:&.> |. >:i. y'
(#~ (= mkcat"0)) >:i. 100x NB. Stephen Makdisi, May 03 2018
CROSSREFS
KEYWORD
nonn,base,more
AUTHOR
EXTENSIONS
Edited and updated by Larry Reeves (larryr(AT)acm.org), Apr 12 2002
Additional comments and example from Larry Reeves (larryr(AT)acm.org), May 25 2001
Terms verified by Rick L. Shepherd, Feb 24 2009
1 more term from Sean A. Irvine, Oct 04 2009
STATUS
approved