Square array T(n,k), n >= 0, k >= 0, read by antidiagonals, where T(n,k) = 4^(2*n*k) * Product_{a=1..n} Product_{b=1..k} (1 - cos(a*Pi/(2*n+1))^2 * cos(b*Pi/(2*k+1))^2).

A340430

Square array T(n,k), n >= 0, k >= 0, read by antidiagonals, where T(n,k) = 4^(2*n*k) * Product_{a=1..n} Product_{b=1..k} (1 - cos(a*Pi/(2*n+1))^2 * cos(b*Pi/(2*k+1))^2).

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =15a(5) =1a(6) =1a(7) =209a(8) =209a(9) =1a(10) =1a(11) =2911a(12) =32625a(13) =2911a(14) =1a(15) =1a(16) =40545a(17) =5015009a(18) =5015009a(19) =40545a(20) =1a(21) =1a(22) =564719a(23) =770100001a(24) =8238791743a(25) =770100001a(26) =564719a(27) =1a(28) =1a(29) =7865521

External references