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Search: id:A068425
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| 1, 3, 6, 12, 25, 50, 100, 201, 402, 804, 1608, 3216, 6433, 12867, 25735, 51471, 102943, 205887, 411774, 823549, 1647099, 3294198, 6588397, 13176794, 26353589, 52707178, 105414357, 210828714, 421657428, 843314856, 1686629713
(list; graph; listen)
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OFFSET
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-1,2
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COMMENT
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In other words, take the binary expansion of pi, drop the decimal point, and interpret the first n+2 bits as an integer.
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EXAMPLE
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The binary expansion of pi (A004601) begins 1, 1. 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1, 0, ... so we get 1, 3, 6, 12, 25, 50, ...
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CROSSREFS
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Cf. A004601, A117721 (primes)
Adjacent sequences: A068422 A068423 A068424 this_sequence A068426 A068427 A068428
Sequence in context: A102254 A007239 A088970 this_sequence A136444 A077854 A099445
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KEYWORD
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easy,nonn
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AUTHOR
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Benoit Cloitre (benoit7848c(AT)orange.fr), Mar 09 2002
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EXTENSIONS
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Revised by njas (and offset changed), Jul 23 2006
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