id:A024398 - OEIS Search Results

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a(n) = [ (2nd elementary symmetric function of S(n))/(first elementary symmetric function of S(n)) ], where S(n) = {first n+1 positive integers congruent to 2 mod 3}.

+0
1

0, 1, 4, 8, 14, 22, 31, 41, 53, 67, 82, 98, 116, 136, 157, 179, 203, 229, 256, 284, 314, 346, 379, 413, 449, 487, 526, 566, 608, 652, 697, 743, 791, 841, 892, 944, 998, 1054, 1111, 1169, 1229, 1291, 1354, 1418, 1484 (list; graph; listen)

	OFFSET	`1,3`
	FORMULA	`(1/4) {3(n^2-n-1) - (-1)^[n/2] }, n>1. - Ralf Stephan, Jun 09 2005`
	CROSSREFS	`Adjacent sequences: A024395 A024396 A024397 this_sequence A024399 A024400 A024401` `Sequence in context: A122224 A004797 A053459 this_sequence A054347 A003682 A011897`
	KEYWORD	`nonn`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu)`

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Last modified October 12 15:26 EDT 2008. Contains 144830 sequences.

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