A086624 - cp's OEIS frontend

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.

n	a(n)
0	1
1	1
2	4
3	19
4	100
5	570
6	3442
7	21685
8	141112
9	941990
10	6419174
11	44493000
12	312818326
13	2226155632
14	16008452202
15	116167346499
16	849724397580
17	6259403310366
18	46399703925202
19	345894094030552

[1, 1, 4, 19, 100, 570, 3442, 21685, 141112, 941990, 6419174, 44493000, 312818326, 2226155632, 16008452202, 116167346499, 849724397580, 6259403310366, 46399703925202, 345894094030552]

cp's OEIS Frontend

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.

Table of values

List of values