id:A084901 - OEIS Search Results

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4^(n-2)n(5n+3)/2.

+0
3

0, 1, 13, 108, 736, 4480, 25344, 136192, 704512, 3538944, 17367040, 83623936, 396361728, 1853882368, 8573157376, 39258685440, 178241142784, 803158884352, 3594887626752, 15994458210304, 70781061038080, 311711546474496 (list; graph; listen)

	OFFSET	`0,3`
	COMMENT	`Binomial transform of A084900. Third binomial transform of heptagonal numbers A000566. Fourth binomial transform of (0,1,5,0,0,0,....).`
	FORMULA	`G.f.: x(1 + x)/(1 - 4x)^3`
	CROSSREFS	`Cf. A084902.` `Sequence in context: A087305 A038384 A038385 this_sequence A006239 A142040 A002648` `Adjacent sequences: A084898 A084899 A084900 this_sequence A084902 A084903 A084904`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Jun 10 2003`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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