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Search: id:A061931
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| A061931 |
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Numbers n such that n divides the (right) 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 A029495 in that all least significant zeros are removed before concatenation.
The next term is > 400000. - Larry Reeves, Jan 16, 2002
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LINKS
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Index entries for related sequences
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EXAMPLE
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1234567 -> (1)(01)(11)(001)(101)(011)(111) 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: A152560 A162926 A042895 this_sequence A057203 A056250 A113870
Adjacent sequences: A061928 A061929 A061930 this_sequence A061932 A061933 A061934
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KEYWORD
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nonn,base
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AUTHOR
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Larry Reeves (larryr(AT)acm.org), May 24 2001
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EXTENSIONS
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Edited and updated by Larry Reeves (larryr(AT)acm.org), Apr 12, 2002
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