A228904 - cp's OEIS frontend

A228904 Triangle defined by g.f. A(x,y) = exp( Sum_{n>=1} x^n/n * Sum_{k=0..n} binomial(nk, k^2) y^k ), as read by rows.

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	1
6	1
7	3
8	7
9	1
10	1
11	4
12	26
13	62
14	1
15	1
16	5
17	70
18	1087
19	1031
20	1
21	1
22	6
23	155
24	9257
25	124702
26	24782
27	1
28	1
29	7
30	301
31	51397
32	4479983
33	26375325
34	774180
35	1
36	1
37	8
38	532
39	215129
40	79666708
41	5059028293
42	8735721640
43	29763855
44	1
45	1
46	9
47	876
48	736410
49	891868573
50	357346615545
51	10783389596184
52	4162906254188
53	1359654560
54	1

[1, 1, 1, 1, 2, 1, 1, 3, 7, 1, 1, 4, 26, 62, 1, 1, 5, 70, 1087, 1031, 1, 1, 6, 155, 9257, 124702, 24782, 1, 1, 7, 301, 51397, 4479983, 26375325, 774180, 1, 1, 8, 532, 215129, 79666708, 5059028293, 8735721640, 29763855, 1, 1, 9, 876, 736410, 891868573, 357346615545, 10783389596184, 4162906254188, 1359654560, 1]

cp's OEIS Frontend

A228904 Triangle defined by g.f. A(x,y) = exp( Sum_{n>=1} x^n/n * Sum_{k=0..n} binomial(nk, k^2) y^k ), as read by rows.

Table of values

List of values

cp's OEIS Frontend

A228904 Triangle defined by g.f. A(x,y) = exp( Sum_{n>=1} x^n/n * Sum_{k=0..n} binomial(n*k, k^2) * y^k ), as read by rows.

Table of values

List of values

A228904 Triangle defined by g.f. A(x,y) = exp( Sum_{n>=1} x^n/n * Sum_{k=0..n} binomial(nk, k^2) y^k ), as read by rows.