Generalized Euler numbers, a(n) = n!*[x^n](sec(7*x)*(-sin(2*x) + sin(4*x) + sin(6*x) + cos(x) + cos(3*x) - cos(5*x))).
A349266
Generalized Euler numbers, a(n) = n!*[x^n](sec(7*x)*(-sin(2*x) + sin(4*x) + sin(6*x) + cos(x) + cos(3*x) - cos(5*x))).
Terms
- a(0) =1a(1) =8a(2) =64a(3) =904a(4) =15872a(5) =355688a(6) =9493504a(7) =296327464a(8) =10562158592a(9) =423645846728
External references
- oeis: A349266