A119819 - cp's OEIS frontend

A119819 a(n) equals the coefficient of x^(n-1) in the (n-1)-th iteration of g.f. A(x) for n>1, with a(1)=1.

n	a(n)
1	1
2	1
3	2
4	12
5	138
6	2370
7	54190
8	1553258
9	53883088
10	2211883428
11	105760271082
12	5819880201432
13	364979361177134
14	25865387272507770
15	2056021496464455000
16	182094050389241652004
17	17861355920109599058260
18	1929874166854161381238676
19	228564755268775651632722308
20	29540844190975459101114949972

[1, 1, 2, 12, 138, 2370, 54190, 1553258, 53883088, 2211883428, 105760271082, 5819880201432, 364979361177134, 25865387272507770, 2056021496464455000, 182094050389241652004, 17861355920109599058260, 1929874166854161381238676, 228564755268775651632722308, 29540844190975459101114949972]

cp's OEIS Frontend

A119819 a(n) equals the coefficient of x^(n-1) in the (n-1)-th iteration of g.f. A(x) for n>1, with a(1)=1.

Table of values

List of values