A228900 - cp's OEIS frontend

A228900 Triangle defined by g.f. A(x,y) = exp( Sum_{n>=1} x^n/n * Sum_{k=0..n} binomial(n^2, (n-k)k) y^k ), as read by rows.

n	a(n)
0	1
1	1
2	1
3	1
4	3
5	1
6	1
7	15
8	15
9	1
10	1
11	155
12	484
13	155
14	1
15	1
16	2685
17	36068
18	36068
19	2685
20	1
21	1
22	65517
23	5082340
24	15763254
25	5082340
26	65517
27	1
28	1
29	2063205
30	1179126560
31	13201421078
32	13201421078
33	1179126560
34	2063205
35	1
36	1
37	79715229
38	411708127954
39	19954261054442
40	61092286569334
41	19954261054442
42	411708127954
43	79715229
44	1

[1, 1, 1, 1, 3, 1, 1, 15, 15, 1, 1, 155, 484, 155, 1, 1, 2685, 36068, 36068, 2685, 1, 1, 65517, 5082340, 15763254, 5082340, 65517, 1, 1, 2063205, 1179126560, 13201421078, 13201421078, 1179126560, 2063205, 1, 1, 79715229, 411708127954, 19954261054442, 61092286569334, 19954261054442, 411708127954, 79715229, 1]

cp's OEIS Frontend

A228900 Triangle defined by g.f. A(x,y) = exp( Sum_{n>=1} x^n/n * Sum_{k=0..n} binomial(n^2, (n-k)k) y^k ), as read by rows.

Table of values

List of values

cp's OEIS Frontend

A228900 Triangle defined by g.f. A(x,y) = exp( Sum_{n>=1} x^n/n * Sum_{k=0..n} binomial(n^2, (n-k)*k) * y^k ), as read by rows.

Table of values

List of values

A228900 Triangle defined by g.f. A(x,y) = exp( Sum_{n>=1} x^n/n * Sum_{k=0..n} binomial(n^2, (n-k)k) y^k ), as read by rows.