A025171 - OEIS

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A025171

Reciprocal Chebyshev polynomial of second kind evaluated at 4 multiplied by (-1)^n.

1, -2, -12, 56, 80, -1056, 832, 15232, -43776, -156160, 1012736, 473088, -17149952, 26730496, 220938240, -869564416, -1795883008, 17504796672, -6275465216, -267525816320, 635459076096, 3009494908928 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	LINKS	`Index entries for sequences related to Chebyshev polynomials.`
	FORMULA	`G.f.: 1/(1+2x+16x^2).`
	MATHEMATICA	`Table[ a^n ChebyshevU[ n, -1/a ], {n, 0, 24} ]/.a->4`
	PROG	`(PARI) a(n)=if(n<0, 0, polcoeff(1/(1+2x+16x^2)+x*O(x^n), n))`
	CROSSREFS	`Sequence in context: A038175 A181541 A197230 * A127214 A124723 A122229` `Adjacent sequences: A025168 A025169 A025170 * A025172 A025173 A025174`
	KEYWORD	`sign`
	AUTHOR	`w.meeussen (wouter.meeussen(AT)pandora.be)`

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Last modified February 16 02:51 EST 2012. Contains 205860 sequences.