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A084098 Expansion of exp(x)tan(2x)/2. 0
0, 1, 2, 11, 36, 341, 1702, 23071, 154056, 2691241, 22470602, 479886131, 4808343276, 121361260541, 1418683841902, 41316096677191, 551971861815696, 18218322689532241, 273815850521907602, 10100775754144668251 (list; graph; refs; listen; history; internal format)
OFFSET

0,3

COMMENTS

Binomial transform of expansion of tan(2x)/2 (0,1,0,8,0,256,...).

FORMULA

E.g.f.: exp(x)tan(2x)/2

CROSSREFS

Cf. A009739.

Sequence in context: A176916 A015519 A096977 * A152819 A178138 A038607

Adjacent sequences:  A084095 A084096 A084097 * A084099 A084100 A084101

KEYWORD

easy,nonn

AUTHOR

Paul Barry (pbarry(AT)wit.ie), May 11 2003

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Last modified February 15 10:52 EST 2012. Contains 205763 sequences.