Triangle used for the integral of even powers of the sine and cosine functions.

Terms

a(0) =-1a(1) =-8a(2) =1a(3) =-90a(4) =18a(5) =-2a(6) =-1344a(7) =336a(8) =-64a(9) =6a(10) =-25200a(11) =7200a(12) =-1800a(13) =300a(14) =-24a(15) =-570240a(16) =178200a(17) =-52800a(18) =11880a(19) =-1728a(20) =120a(21) =-15135120a(22) =5045040a(23) =-1681680a(24) =458640a(25) =-91728a(26) =11760a(27) =-720a(28) =-461260800a(29) =161441280