id:A152551 - OEIS Search Results

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a(n) = (2*n+1)^[(n-1)/2].

+0
5

1, 1, 1, 7, 9, 121, 169, 3375, 4913, 130321, 194481, 6436343, 9765625, 387420489, 594823321, 27512614111, 42618442977, 2251875390625, 3512479453921, 208728361158759, 327381934393961, 21611482313284249, 34050628916015625 (list; graph; listen)

	OFFSET	`0,4`
	COMMENT	`Compare to row sums of triangle A152550: (2n+1)^(n-1).` `Triangle A152550 lists coefficients in a q-analogue of the function [LambertW(-2x)/(-2x)]^(1/2).`
	FORMULA	`a(n) = Sum_{k=0..n(n-1)/2} A152550(n,k)*(-1)^k.`
	PROGRAM	`(PARI) a(n)=(2*n+1)^((n-1)\2)`
	CROSSREFS	`Cf. A152550, A152552 (q=2), A152553 (q=3).` `Sequence in context: A137058 A116237 A123746 this_sequence A012252 A027723 A046265` `Adjacent sequences: A152548 A152549 A152550 this_sequence A152552 A152553 A152554`
	KEYWORD	`nonn`
	AUTHOR	`Paul D. Hanna (pauldhanna(AT)juno.com), Dec 07 2008`

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Last modified December 2 11:54 EST 2009. Contains 167921 sequences.

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