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Search: id:A047770
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A047770 A047769(2n). +0
2
0, 1, 5, 26, 133, 708, 3860, 21604, 123266, 715216, 4206956, 25032840, 150413322, 911379384, 5562367173, 34164355715, 211015212580, 1309815397995, 8166460799097, 51120054233490, 321156223592865, 2024257417808379, 12797201858645100 (list; graph; listen)
OFFSET

1,3
CROSSREFS

Sequence in context: A003583 A033115 A033123 this_sequence A047757 A047755 A047768

Adjacent sequences: A047767 A047768 A047769 this_sequence A047771 A047772 A047773

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.

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