id:A127606 - OEIS Search Results

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a[n]=2^(2*n*n)*product(product(cos(i*Pi/(2*n+1))^2+ sin(j*Pi/(2*n+1))^2,j=1..n),i=1..n).

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1, 4, 176, 79808, 372713728, 17931360207872, 8887976555024756736, 45390122553039546330628096, 2388340820825093234015277927170048, 1294826675280341699389150405743029631844352 (list; graph; listen)

	OFFSET	`0,2`
	MAPLE	`for n from 0 to 12 do a[n]:=2^(2nn)product(product(cos(iPi/(2n+1))^2+ sin(jPi/(2*n+1))^2, j=1..n), i=1..n) od: seq(round(evalf(a[n], 300)), n=0..12);`
	CROSSREFS	`Cf. A004003.` `Sequence in context: A081783 A006433 A113254 this_sequence A041945 A082393 A024266` `Adjacent sequences: A127603 A127604 A127605 this_sequence A127607 A127608 A127609`
	KEYWORD	`nonn`
	AUTHOR	`Miklos Kristof (kristmikl(AT)freemail.hu), Apr 03 2007`

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Last modified December 1 19:22 EST 2009. Contains 167811 sequences.

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