id:A101480 - OEIS Search Results

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E.g.f. (1/cosh(x)+tanh(x))*(exp(2*x)-exp(-x))/3.

+0
1

0, 1, 3, 3, 3, 11, 63, 43, -837, 171, 34023, 683, -1800477, 2731, 132912783, 10923, -12927652917, 43691, 1603253204343, 174763, -246914125142157, 699051, 46232582930156703, 2796203, -10343022775699132197, 11184811, 2724715006195438297863, 44739243, -834839760935753154167037 (list; graph; listen)

	OFFSET	`0,3`
	COMMENT	`A transform of the Jacobsthal numbers.` `a(2n)=A007583(n)=(2*4^n+1)/3.`
	CROSSREFS	`Cf. A101473, A001045.` `Sequence in context: A029616 A129227 A097161 this_sequence A133797 A052900 A024947` `Adjacent sequences: A101477 A101478 A101479 this_sequence A101481 A101482 A101483`
	KEYWORD	`easy,sign`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Jan 21 2005`
	EXTENSIONS	`Corrected by njas, Nov 05 2005`

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.

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