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Search: id:A029519
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| A029519 |
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Numbers n such that n divides the (left) concatenation of all numbers <= n written in base 2 (most significant digit on right). |
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+0
142
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OFFSET
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1,2
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COMMENT
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This sequence differs from A061955 in that all least significant zeros are removed before concatenation.
The next term is > 410000. - Larry Reeves, Jan 16, 2002
Any further terms are > 1125000. [From Rick L. Shepherd (rshepherd2(AT)hotmail.com), Feb 24 2009]
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LINKS
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Index entries for related sequences
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EXAMPLE
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7654321 -> (111)(011)(101)(001)(11)(01)(1) base 2 -> 1111110111111 base 2 = 8127 and 7 divides 8127
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CROSSREFS
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Cf. A029447-A029470, A029471-A029494, A029495-A029518, A029519-A029542, A061931-A061954, A061955-A061978.
Sequence in context: A041663 A042825 A076033 this_sequence A045424 A106968 A079779
Adjacent sequences: A029516 A029517 A029518 this_sequence A029520 A029521 A029522
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KEYWORD
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nonn,base,more
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AUTHOR
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Olivier Gerard (olivier.gerard(AT)gmail.com)
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EXTENSIONS
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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 (rshepherd2(AT)hotmail.com), Feb 24 2009
1 more term from Sean A. Irvine (sairvin(AT)xtra.co.nz), Oct 04 2009
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