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A061945 Numbers n such that n divides the (right) concatenation of all numbers <= n written in base 16 (most significant digit on right). 1
1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 25, 29, 53, 110, 177, 237, 255, 2260, 3214, 4313, 4563, 7595, 20220, 35139, 167134, 180319, 186885, 315850, 439975, 559740, 4393188, 8414132, 8434510 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
This sequence differs from A029509 in that all least significant zeros are removed before concatenation.
No more terms < 10^7. - Lars Blomberg, Oct 22 2011
LINKS
EXAMPLE
See A061931 for example.
MATHEMATICA
b = 16; c = {}; Select[Range[10^4], Divisible[FromDigits[c = Join[c, IntegerDigits[IntegerReverse[#, b], b]], b], #] &] (* Robert Price, Mar 08 2020 *)
PROG
(PARI) lista(nn, m=16) = my(s, t); for(k=1, nn, s=k/m^valuation(k, m); while(s, t=t*m+s%m; s\=m); if(t%k==0, print1(k, ", "))); \\ Jinyuan Wang, Dec 05 2020
CROSSREFS
Sequence in context: A232823 A329469 A018412 * A029509 A364541 A048645
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(32)-a(34) from Lars Blomberg, Oct 22 2011
STATUS
approved

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Last modified March 19 06:53 EDT 2024. Contains 370953 sequences. (Running on oeis4.)