id:A030280 - OEIS Search Results

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COMPOSE triangular numbers with triangular numbers.

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1, 6, 30, 137, 588, 2415, 9600, 37209, 141336, 528049, 1945800, 7086555, 25550547, 91319973, 323890062, 1140985116, 3995155506, 13913280006, 48216776266, 166355744244, 571636515369, 1957015021744, 6677155551312 (list; graph; listen)

	OFFSET	`1,2`
	LINKS	`N. J. A. Sloane, Transforms`
	FORMULA	`G.f.: [(1-x)^6]/[(1-4x+3x^2-x^3)^3].`
	CROSSREFS	`Sequence in context: A073389 A036068 A081895 this_sequence A034545 A002920 A001334` `Adjacent sequences: A030277 A030278 A030279 this_sequence A030281 A030282 A030283`
	KEYWORD	`nonn,nice`
	AUTHOR	`Christian G. Bower (bowerc(AT)usa.net)`

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Last modified November 25 08:46 EST 2009. Contains 167481 sequences.

AT&T Labs Research