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Search: id:A080567
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A080567 1 + Sum_{k=2..n} 2^((prime(k)-1)/2). +0
14
1, 3, 7, 15, 47, 111, 367, 879, 2927, 19311, 52079, 314223, 1362799, 3459951, 11848559, 78957423, 615828335, 1689570159, 10279504751, 44639243119, 113358719855, 663114533743, 2862137789295, 20454323833711, 301929300544367 (list; graph; listen)
OFFSET

1,2

COMMENT

Take an initial segment of A080545, stopping at the n-th 1, reverse and interpret as a binary number.

CROSSREFS

Cf. A080355, A080545.

Sequence in context: A050565 A097111 A151401 this_sequence A146448 A023370 A096422

Adjacent sequences: A080564 A080565 A080566 this_sequence A080568 A080569 A080570

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com), based on information supplied by Artur Jasinski (grafix(AT)csl.pl), Mar 21 2003

EXTENSIONS

More terms from Vladeta Jovovic (vladeta(AT)eunet.rs), Mar 26 2003

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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.


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