id:A084900 - OEIS Search Results

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3^(n-2)n(5n+1)/2.

+0
3

0, 1, 11, 72, 378, 1755, 7533, 30618, 119556, 452709, 1673055, 6062364, 21611934, 75996063, 264126177, 908764110, 3099363912, 10489051017, 35255264499, 117775828656, 391294693890, 1293597012771, 4257363753621, 13954111172802 (list; graph; listen)

	OFFSET	`0,3`
	COMMENT	`Binomial transform of A084899. Second binomial transform of heptagonal numbers A000566. Third binomial transform of (0,1,5,0,0,0,....).`
	FORMULA	`G.f.: x(1 + 2x)/(1 - 3x)^3`
	CROSSREFS	`Cf. A084901.` `Sequence in context: A092044 A156149 A006975 this_sequence A142015 A123039 A163775` `Adjacent sequences: A084897 A084898 A084899 this_sequence A084901 A084902 A084903`
	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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