id:A053990 - OEIS Search Results

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Numbers of the form x*(x + 1)*y*(y + 1) ("bipronics") where x and y are distinct.

+0
5

0, 12, 24, 40, 60, 72, 84, 112, 120, 144, 180, 220, 240, 252, 264, 312, 336, 360, 364, 420, 432, 480, 504, 540, 544, 600, 612, 660, 672, 684, 760, 792, 840, 864, 924, 936, 1012, 1080, 1092, 1104, 1120, 1200, 1260, 1300, 1320, 1404, 1440, 1512, 1584, 1624 (list; graph; listen)

	OFFSET	`1,2`
	EXAMPLE	`Taking x=1, y=2 gives 2 * 6 =12`
	CROSSREFS	`Cf. A054731, A054734, A072389.` `Sequence in context: A102749 A085231 A057715 this_sequence A026365 A051435 A102067` `Adjacent sequences: A053987 A053988 A053989 this_sequence A053991 A053992 A053993`
	KEYWORD	`nonn,easy`
	AUTHOR	`Stuart M. Ellerstein (ellerstein(AT)aol.com), Apr 04 2000`
	EXTENSIONS	`More terms from James A. Sellers (sellersj(AT)math.psu.edu), Apr 22 2000`

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Last modified November 25 14:49 EST 2009. Contains 167514 sequences.

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