A127606 - OEIS

This site is supported by donations to The OEIS Foundation.

A127606

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).

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

	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 * A041945 A082393 A176351` `Adjacent sequences: A127603 A127604 A127605 * A127607 A127608 A127609`
	KEYWORD	`nonn`
	AUTHOR	`Miklos Kristof (kristmikl(AT)freemail.hu), Apr 03 2007`

Content is available under The OEIS End-User License Agreement .

Last modified February 16 20:57 EST 2012. Contains 205966 sequences.