Triangle read by rows, expansion of e.g.f. exp(x*(cos(z) + cosh(z) - 2)/2), nonzero coefficients of z.

A291452

Triangle read by rows, expansion of e.g.f. exp(x*(cos(z) + cosh(z) - 2)/2), nonzero coefficients of z.

Terms

    a(0) =1a(1) =0a(2) =1a(3) =0a(4) =1a(5) =35a(6) =0a(7) =1a(8) =495a(9) =5775a(10) =0a(11) =1a(12) =8255a(13) =450450a(14) =2627625a(15) =0a(16) =1a(17) =130815a(18) =35586525a(19) =727476750a(20) =2546168625a(21) =0a(22) =1a(23) =2098175a(24) =2941884000a(25) =181262956875

External references