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A061955
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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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142
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1, 3, 7, 29, 375, 545, 971, 1643, 37801, 435805, 554423, 565947, 645915, 733533, 871927, 9703985
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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COMMENTS
| This sequence differs from A029519 in that all least significant zeros are kept during concatenation.
No more terms < 10^7. [Lars Blomberg, Aug 31 2011]
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LINKS
| Index entries for related sequences
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EXAMPLE
| 7654321 -> (111)(011)(101)(001)(11)(01)(1) base 2 ->11101110100111011 base 2 = 122171 and 7 divides 122171
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CROSSREFS
| Cf. A029447-A029470, A029471-A029494, A029495-A029518, A029519-A029542, A061931-A061954, A061955-A061978.
Sequence in context: A082096 A119325 A048722 * A113834 A057181 A136934
Adjacent sequences: A061952 A061953 A061954 * A061956 A061957 A061958
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KEYWORD
| nonn,base
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AUTHOR
| Larry Reeves (larryr(AT)acm.org), May 24 2001
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EXTENSIONS
| Edited and updated by Larry Reeves (larryr(AT)acm.org), Apr 12, 2002; Aug 25, 2002
a(13)-a(16) from Lars Blomberg (lars.blomberg(AT)visit.se), Aug 31 2011
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