A186236 - cp's OEIS frontend

A186236 G.f.: exp( Sum_{n>=0} [ Sum_{k=0..2n} A027907(n,k)^2 x^k ]* x^n/n ), where A027907 is the triangle of trinomial coefficients.

n	a(n)
0	1
1	1
2	2
3	5
4	13
5	34
6	93
7	262
8	753
9	2198
10	6502
11	19449
12	58724
13	178739
14	547836
15	1689407
16	5237939
17	16318137
18	51056027
19	160363129
20	505456920
21	1598263936
22	5068483189
23	16116397411
24	51371962474
25	164123564499
26	525447953073
27	1685534207788
28	5416719384326
29	17437073203711

[1, 1, 2, 5, 13, 34, 93, 262, 753, 2198, 6502, 19449, 58724, 178739, 547836, 1689407, 5237939, 16318137, 51056027, 160363129, 505456920, 1598263936, 5068483189, 16116397411, 51371962474, 164123564499, 525447953073, 1685534207788, 5416719384326, 17437073203711]

cp's OEIS Frontend

A186236 G.f.: exp( Sum_{n>=0} [ Sum_{k=0..2n} A027907(n,k)^2 x^k ]* x^n/n ), where A027907 is the triangle of trinomial coefficients.

Table of values

List of values

cp's OEIS Frontend

A186236 G.f.: exp( Sum_{n>=0} [ Sum_{k=0..2*n} A027907(n,k)^2 * x^k ]* x^n/n ), where A027907 is the triangle of trinomial coefficients.

Table of values

List of values

A186236 G.f.: exp( Sum_{n>=0} [ Sum_{k=0..2n} A027907(n,k)^2 x^k ]* x^n/n ), where A027907 is the triangle of trinomial coefficients.