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A115618 1+(n+6)*2^(n-1). 1
4, 8, 17, 37, 81, 177, 385, 833, 1793, 3841, 8193, 17409, 36865, 77825, 163841, 344065, 720897, 1507329, 3145729, 6553601, 13631489, 28311553, 58720257, 121634817, 251658241, 520093697, 1073741825, 2214592513, 4563402753, 9395240961, 19327352833, 39728447489 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

REFERENCES

R. J. Lang, Origami approximate geometric constructions, in Tribute to a Mathemagician, Peters, 2005, pp. 223-239.

CROSSREFS

Sequence in context: A067773 A008372 A005697 * A019479 A084814 A098125

Adjacent sequences:  A115615 A115616 A115617 * A115619 A115620 A115621

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com), Apr 11 2006

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Last modified February 15 23:53 EST 2012. Contains 205860 sequences.