E.g.f.: (1+sqrt(2)*sin(x/sqrt(2))*cosh(x/sqrt(2))+sin(x/sqrt(2))*sinh(x/sqrt(2)))/(cos(x/sqrt(2))*cosh(x/sqrt(2))).

A178964

E.g.f.: (1+sqrt(2)*sin(x/sqrt(2))*cosh(x/sqrt(2))+sin(x/sqrt(2))*sinh(x/sqrt(2)))/(cos(x/sqrt(2))*cosh(x/sqrt(2))).

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =4a(6) =14a(7) =34a(8) =69a(9) =496a(10) =2896a(11) =11056a(12) =33661a(13) =349504a(14) =2856944a(15) =14873104a(16) =60376809a(17) =819786496a(18) =8615785216a(19) =56814228736a(20) =288294050521

External references