A382674 - cp's OEIS frontend

A382674 Square array A(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where A(n,k) = n! * k! * [x^n * y^k] exp(x+y) / (exp(x) + exp(y) - exp(x+y))^4.

n	a(n)
0	1
1	1
2	1
3	1
4	5
5	1
6	1
7	13
8	13
9	1
10	1
11	29
12	77
13	29
14	1
15	1
16	61
17	325
18	325
19	61
20	1
21	1
22	125
23	1181
24	2357
25	1181
26	125
27	1
28	1
29	253
30	3973
31	13621
32	13621
33	3973
34	253
35	1
36	1
37	509
38	12797
39	69269
40	118061
41	69269
42	12797
43	509
44	1
45	1
46	1021
47	40165
48	326005
49	862261
50	862261
51	326005
52	40165
53	1021
54	1

[1, 1, 1, 1, 5, 1, 1, 13, 13, 1, 1, 29, 77, 29, 1, 1, 61, 325, 325, 61, 1, 1, 125, 1181, 2357, 1181, 125, 1, 1, 253, 3973, 13621, 13621, 3973, 253, 1, 1, 509, 12797, 69269, 118061, 69269, 12797, 509, 1, 1, 1021, 40165, 326005, 862261, 862261, 326005, 40165, 1021, 1]

cp's OEIS Frontend

A382674 Square array A(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where A(n,k) = n! * k! * [x^n * y^k] exp(x+y) / (exp(x) + exp(y) - exp(x+y))^4.

Table of values

List of values