id:A136558 - OEIS Search Results

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G.f.: A(x) = Sum_{n>=0} asinh( 2^(2n+1)*x )^(2n+1) / (2n+1)! ; a power series in x with integer coefficients.

+0
3

2, 0, 84, 0, 276892, 0, 111457917800, 0, 6660816097416169260, 0, 66597307693046550483175282456, 0, 120167520447600665027319450022840022638104, 0 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`G.f.: A(x) = 2x + 84x^3 + 276892x^5 + 111457917800x^7 +...`
	PROGRAM	`(PARI) {a(n)=polcoeff(sum(k=0, n\2, asinh(2^(2k+1)x +xO(x^n))^(2k+1)/(2*k+1)!), n)}`
	CROSSREFS	`Cf. A136559.` `Adjacent sequences: A136555 A136556 A136557 this_sequence A136559 A136560 A136561` `Sequence in context: A012334 A012451 A012447 this_sequence A136559 A009740 A132860`
	KEYWORD	`nonn`
	AUTHOR	`Paul D. Hanna (pauldhanna(AT)juno.com), Jan 10 2008`

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Last modified January 7 17:35 EST 2009. Contains 152824 sequences.

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