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Search: id:A125050
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A125050 a(1) = 1. If a(n) is composite, a(n+1) = 2*a(n)+1; otherwise, a(n+1) = 2*a(n). +0
2
1, 2, 4, 9, 19, 38, 77, 155, 311, 622, 1245, 2491, 4983, 9967, 19934, 39869, 79738, 159477, 318955, 637911, 1275823, 2551646, 5103293, 10206587, 20413175, 40826351, 81652702, 163305405, 326610811, 653221623, 1306443247, 2612886495 (list; graph; listen)
OFFSET

1,2

CROSSREFS

Cf. A125049.

Sequence in context: A000678 A081490 A129784 this_sequence A056186 A054135 A099568

Adjacent sequences: A125047 A125048 A125049 this_sequence A125051 A125052 A125053

KEYWORD

nonn

AUTHOR

Franklin T. Adams-Watters (FrankTAW(AT)Netscape.net), Nov 17 2006

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Last modified December 11 12:57 EST 2009. Contains 170656 sequences.


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