E.g.f.: Product_{k>=1} (1 + x^(4*k-3)/(4*k-3)) / (1 - x^(4*k-3)/(4*k-3)).

A326863

E.g.f.: Product_{k>=1} (1 + x^(4*k-3)/(4*k-3)) / (1 - x^(4*k-3)/(4*k-3)).

Terms

    a(0) =1a(1) =2a(2) =4a(3) =12a(4) =48a(5) =288a(6) =2016a(7) =14112a(8) =112896a(9) =1096704a(10) =12063744a(11) =135894528a(12) =1630734336a(13) =22157549568a(14) =331366920192

External references