Main diagonal of square table A086623 of coefficients of f(x,y) that satisfies f(x,y) = (1-xy)/[(1-x)(1-y)] + xy*f(x,y)^2.

A086624

Main diagonal of square table A086623 of coefficients of f(x,y) that satisfies f(x,y) = (1-xy)/[(1-x)(1-y)] + xy*f(x,y)^2.

Terms

    a(0) =1a(1) =1a(2) =4a(3) =19a(4) =100a(5) =570a(6) =3442a(7) =21685a(8) =141112a(9) =941990a(10) =6419174a(11) =44493000a(12) =312818326a(13) =2226155632a(14) =16008452202a(15) =116167346499a(16) =849724397580

External references