A199248 - cp's OEIS frontend

A199248 G.f. satisfies: A(x) = exp( Sum_{n>=1} [Sum_{k=0..2n} A027907(n,k)^2 x^k * A(x)^k]* x^n/n ), where A027907 is the triangle of trinomial coefficients.

n	a(n)
0	1
1	1
2	2
3	6
4	20
5	69
6	248
7	923
8	3523
9	13706
10	54152
11	216710
12	876607
13	3578405
14	14722432
15	60986158
16	254145337
17	1064712328
18	4481577078
19	18943753140
20	80381689202
21	342254333393
22	1461864544896
23	6262021627055
24	26894816382199
25	115792035533779
26	499648608539714
27	2160504474956390

[1, 1, 2, 6, 20, 69, 248, 923, 3523, 13706, 54152, 216710, 876607, 3578405, 14722432, 60986158, 254145337, 1064712328, 4481577078, 18943753140, 80381689202, 342254333393, 1461864544896, 6262021627055, 26894816382199, 115792035533779, 499648608539714, 2160504474956390]

cp's OEIS Frontend

A199248 G.f. satisfies: A(x) = exp( Sum_{n>=1} [Sum_{k=0..2n} A027907(n,k)^2 x^k * A(x)^k]* x^n/n ), where A027907 is the triangle of trinomial coefficients.

Table of values

List of values

cp's OEIS Frontend

A199248 G.f. satisfies: A(x) = exp( Sum_{n>=1} [Sum_{k=0..2*n} A027907(n,k)^2 * x^k * A(x)^k]* x^n/n ), where A027907 is the triangle of trinomial coefficients.

Table of values

List of values

A199248 G.f. satisfies: A(x) = exp( Sum_{n>=1} [Sum_{k=0..2n} A027907(n,k)^2 x^k * A(x)^k]* x^n/n ), where A027907 is the triangle of trinomial coefficients.