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Search: id:A000643
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A000643 a(n)=a(n-1) + 2^a(n-2). +0
3
0, 0, 1, 2, 4, 8, 24, 280, 16777496, 1942668892225729070919461906823518906642406839052139521251812409738904285205225275672 (list; graph; listen)
OFFSET

0,4

REFERENCES

D. E. Knuth, personal communication.

CROSSREFS

Cf. A000659.

Adjacent sequences: A000640 A000641 A000642 this_sequence A000644 A000645 A000646

Sequence in context: A002908 A004528 A066535 this_sequence A112285 A037170 A006399

KEYWORD

nonn,easy

AUTHOR

njas

EXTENSIONS

1 more term from Vladeta Jovovic (vladeta(AT)Eunet.yu), Mar 19 2000

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Last modified October 11 13:47 EDT 2008. Contains 144830 sequences.


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