id:A075615 - OEIS Search Results

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Let P(k,X)=prod(i=1,2*k, X-1/cos(Pi*(2*i-1)/(4*k)) ) which is a polynomial with integer coefficients. Sequence gives array of coefficients for P(k,X).

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1, 0, -2, 1, 0, -8, 0, 8, 1, 0, -18, 0, 48, 0, -32, 1, 0, -32, 0, 160, 0, -256, 0, 128, 1, 0, -50, 0, 400, 0, -1120, 0, 1280, 0, -512, 1, 0, -72, 0, 840, 0, -3584, 0, 6912, 0, -6144, 0, 2048, 1, 0, -98, 0, 1568, 0, -9408, 0, 26880, 0, -39424, 0, 28672, 0, -8192, 1, 0, -128, 0, 2688, 0, -21504, 0, 84480, 0, -180224, 0 (list; graph; listen)

	OFFSET	`1,3`
	COMMENT	`included in A053120`
	CROSSREFS	`Sequence in context: A117651 A109971 A021896 this_sequence A076341 A110510 A051122` `Adjacent sequences: A075612 A075613 A075614 this_sequence A075616 A075617 A075618`
	KEYWORD	`easy,sign`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Oct 11 2002`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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