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 A029520 Numbers n such that n divides the (left) concatenation of all numbers <= n written in base 3 (most significant digit on right). 1
 1, 4, 5, 7, 19, 443, 19952, 81544, 919648, 1186844 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS This sequence differs from A061956 in that all least significant zeros are removed before concatenation. No more terms < 10^7. [Lars Blomberg, Sep 02 2011] LINKS EXAMPLE See A029519 for example. PROG (J) ab=. #.^:_1 mkcat=. [ ab&.> [ #.&.> [ |.@:ab&.> [: |. [: >: [: i. ] seq=. ] +. [ #. [: ; mkcat 3 (] #~ ] = seq"0) >: i.500x NB. Stephen Makdisi, May 03 2018 CROSSREFS Cf. A029447-A029470, A029471-A029494, A029495-A029518, A029519-A029542, A061931-A061954, A061955-A061978. Sequence in context: A056659 A292321 A049896 * A123368 A292164 A178439 Adjacent sequences:  A029517 A029518 A029519 * A029521 A029522 A029523 KEYWORD nonn,base,more AUTHOR 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), Jun 04 2001 a(9)-a(10) from Lars Blomberg, Sep 02 2011 STATUS approved

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Last modified October 17 15:32 EDT 2019. Contains 328116 sequences. (Running on oeis4.)