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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; refs; listen; history; internal format)
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OFFSET
| -1,2
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COMMENTS
| 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
| 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
| Cf. A004601, A117721 (primes)
Sequence in context: A102254 A007239 A088970 * A136444 A077854 A187260
Adjacent sequences: A068422 A068423 A068424 * A068426 A068427 A068428
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KEYWORD
| easy,nonn
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AUTHOR
| Benoit Cloitre (benoit7848c(AT)orange.fr), Mar 09 2002
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EXTENSIONS
| Revised by N. J. A. Sloane (njas(AT)research.att.com) (and offset changed), Jul 23 2006
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