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A086952 n^2*4^n/4. 2
0, 1, 16, 144, 1024, 6400, 36864, 200704, 1048576, 5308416, 26214400, 126877696, 603979776, 2835349504, 13153337344, 60397977600, 274877906944, 1241245548544, 5566277615616, 24807731101696, 109951162777600 (list; graph; refs; listen; history; internal format)
OFFSET

0,3

COMMENTS

Binomial transform of A086951. Third binomial transform of decagonal numbers A001107.

FORMULA

G.f.: x(1+4x)/(1-4x)^3

CROSSREFS

Sequence in context: A004409 A054851 A000762 * A155663 A077485 A131705

Adjacent sequences:  A086949 A086950 A086951 * A086953 A086954 A086955

KEYWORD

easy,nonn

AUTHOR

Paul Barry (pbarry(AT)wit.ie), Jul 24 2003

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