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A121880 2^n - A122536(n). 1
0, 2, 4, 10, 20, 44, 88, 182, 364, 738, 1476, 2972, 5944, 11924, 23848, 47768, 95536, 191214, 382428, 765136, 1530272, 3061104, 6122208, 12245530, 24491060, 48984342, 97968684, 195941804, 391883608, 783776080 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

CROSSREFS

Cf. A122536. Similar to but different from A094536.

See also A093370.

Sequence in context: A026644 A167193 A026666 * A094536 A003407 A151523

Adjacent sequences:  A121877 A121878 A121879 * A121881 A121882 A121883

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com), Sep 21 2006

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Last modified February 13 13:22 EST 2012. Contains 205483 sequences.