Denominator of ez(n-1)*n!/(4^n-2^n) where ez(n) is the n-th coefficient of sec(t)+tan(t) for n>0, a(0) = 1.

A193473

Denominator of ez(n-1)*n!/(4^n-2^n) where ez(n) is the n-th coefficient of sec(t)+tan(t) for n>0, a(0) = 1.

Terms

    a(0) =1a(1) =2a(2) =6a(3) =56a(4) =30a(5) =992a(6) =42a(7) =16256a(8) =30a(9) =261632a(10) =66a(11) =4192256a(12) =2730a(13) =67100672a(14) =6a(15) =1073709056a(16) =510a(17) =17179738112a(18) =798a(19) =274877382656a(20) =330a(21) =628292059136a(22) =138a(24) =2730a(26) =6a(28) =870

External references