Triangle of coefficients in expansion of elliptic function sn(u) in powers of u and k.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =14a(5) =1a(6) =1a(7) =135a(8) =135a(9) =1a(10) =1a(11) =1228a(12) =5478a(13) =1228a(14) =1a(15) =1a(16) =11069a(17) =165826a(18) =165826a(19) =11069a(20) =1a(21) =1a(22) =99642a(23) =4494351a(24) =13180268a(25) =4494351a(26) =99642a(27) =1a(28) =1a(29) =896803