A119372 - cp's OEIS frontend

A119372 G.f. satisfies: A(x) = 1 + x(1-x-x^2)A(x) + x^2(3+2x)*A(x)^2.

n	a(n)
0	1
1	1
2	3
3	9
4	30
5	104
6	374
7	1380
8	5197
9	19893
10	77170
11	302716
12	1198729
13	4785455
14	19238706
15	77821522
16	316506253
17	1293489529
18	5309112257
19	21876225899
20	90459484106
21	375256749620
22	1561259497099
23	6513108751281
24	27238006266620

[1, 1, 3, 9, 30, 104, 374, 1380, 5197, 19893, 77170, 302716, 1198729, 4785455, 19238706, 77821522, 316506253, 1293489529, 5309112257, 21876225899, 90459484106, 375256749620, 1561259497099, 6513108751281, 27238006266620]

cp's OEIS Frontend

A119372 G.f. satisfies: A(x) = 1 + x(1-x-x^2)A(x) + x^2(3+2x)*A(x)^2.

Table of values

List of values

cp's OEIS Frontend

A119372 G.f. satisfies: A(x) = 1 + x*(1-x-x^2)*A(x) + x^2*(3+2*x)*A(x)^2.

Table of values

List of values

A119372 G.f. satisfies: A(x) = 1 + x(1-x-x^2)A(x) + x^2(3+2x)*A(x)^2.