A084169 - OEIS

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A084169

A Pell Jacobsthal product.

0, 1, 2, 15, 60, 319, 1470, 7267, 34680, 168435, 810898, 3921103, 18918900, 91381991, 441150502, 2130258075, 10285325040, 49663079099, 239791814010, 1157823924167, 5590452446700, 26993130847215, 130334271942158 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,3`
	COMMENTS	`a(n)=A001045(n)*A000129(n).`
	FORMULA	`a(n)=((sqrt(2)+1)^n(2^n-(-1)^n)-(sqrt(2)-1)^n((-2)^n-1))sqrt(2)/12` `Empirical G.f.: x(1-2x^2)/(1-2x-13x^2-4x^3+4x^4). [Colin Barker, Jan 16 2012]`
	CROSSREFS	`Sequence in context: A126019 A071237 A006470 * A000181 A047146 A084187` `Adjacent sequences: A084166 A084167 A084168 * A084170 A084171 A084172`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), May 18 2003`

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Last modified February 18 00:14 EST 2012. Contains 206085 sequences.