id:A026058 - OEIS Search Results

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a(n) = (d(n)-r(n))/2, where d = A026057 and r is the periodic sequence with fundamental period (0,0,1,0).

+0
1

13, 25, 41, 63, 90, 123, 162, 209, 263, 325, 395, 475, 564, 663, 772, 893, 1025, 1169, 1325, 1495, 1678, 1875, 2086, 2313, 2555, 2813, 3087, 3379, 3688, 4015, 4360, 4725, 5109, 5513, 5937, 6383, 6850, 7339, 7850, 8385, 8943, 9525, 10131, 10763, 11420, 12103, 12812, 13549, 14313, 15105, 15925 (list; graph; listen)

	OFFSET	`4,1`
	FORMULA	`a(n)= - 0.125 - 0.125( - 1)^n + 0.25cos(nPi/2) + (n + 4)(n^2 + 20*n + 39)/12 [From Richard Choulet (richardchoulet(AT)yahoo.fr), Dec 13 2008]`
	CROSSREFS	`Sequence in context: A161603 A075033 A017533 this_sequence A032697 A125724 A163551` `Adjacent sequences: A026055 A026056 A026057 this_sequence A026059 A026060 A026061`
	KEYWORD	`nonn`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu)`

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Last modified November 24 23:16 EST 2009. Contains 167481 sequences.

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