E.g.f. S(x) satisfies: C(x)^2 - S(x)^2 = 1 and D(x)^3 - S(x)^3 = 1, where functions C(x) and D(x) are described by A280621 and A280622, respectively.

A280620

E.g.f. S(x) satisfies: C(x)^2 - S(x)^2 = 1 and D(x)^3 - S(x)^3 = 1, where functions C(x) and D(x) are described by A280621 and A280622, respectively.

Terms

    a(0) =1a(1) =0a(2) =1a(3) =4a(4) =1a(5) =100a(6) =161a(7) =1764a(8) =22001a(9) =49700a(10) =1649921a(11) =10057124a(12) =105372001a(13) =2044251300a(14) =12879413281a(15) =315936586084

External references