G.f.: G'(x) / G(x) where G(x) = 1 / sqrt( AGM((1 - 3*x)^2, (1 + x)^2) ) is the g.f. of A245931.

A245932

G.f.: G'(x) / G(x) where G(x) = 1 / sqrt( AGM((1 - 3*x)^2, (1 + x)^2) ) is the g.f. of A245931.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =9a(4) =41a(5) =121a(6) =281a(7) =673a(8) =2017a(9) =6721a(10) =21121a(11) =61065a(12) =171497a(13) =495769a(14) =1488761a(15) =4509793a(16) =13468897a(17) =39688609a(18) =116869153a(19) =346788009a(20) =1035199817a(21) =3090560089a(22) =9200749433a(23) =27347417281a(24) =81352371841a(25) =242426988961a(26) =723125351521

External references