id:A079810 - OEIS Search Results

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Sums of diagonals (upward from left to right) of the triangle shown in A079809.

+0
2

1, 1, 5, 3, 8, 8, 16, 12, 21, 21, 33, 27, 40, 40, 56, 48, 65, 65, 85, 75, 96, 96, 120, 108, 133, 133, 161, 147, 176, 176, 208, 192, 225, 225, 261, 243, 280, 280, 320, 300, 341, 341, 385, 363, 408, 408, 456, 432, 481, 481, 533, 507, 560, 560, 616, 588, 645, 645 (list; graph; listen)

	OFFSET	`1,3`
	FORMULA	`a(4k) = 3k^2. a(4k+1) = a(4k+2) = 3k^2+4k+1. a(4k+3) = 3k^2+8k+5.`
	EXAMPLE	`a(7) = T(7,1)+T(6,2)+T(5,3)+T(4,4) = 7+2+3+4 = 16.`
	CROSSREFS	`Cf. A079808, A079809.` `Cf. A079811, A092542.` `Sequence in context: A021654 A021069 A010484 this_sequence A092748 A078302 A112812` `Adjacent sequences: A079807 A079808 A079809 this_sequence A079811 A079812 A079813`
	KEYWORD	`nonn`
	AUTHOR	`Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Feb 10 2003`
	EXTENSIONS	`Edited by David Wasserman (wasserma(AT)spawar.navy.mil), May 11 2004`

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Last modified September 8 13:07 EDT 2008. Contains 143486 sequences.

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