A382959 - cp's OEIS frontend

A382959 a(n) = (n!)^2 * [(x*y)^n] Product_{k>=1} (1 + (x^k + y^k)/k!).

n	a(n)
0	1
1	0
2	0
3	6
4	8
5	130
6	342
7	2590
8	21240
9	167730
10	1874930
11	46128610
12	417338462
13	5163377570
14	542567363366
15	3984766703746
16	42736508056760
17	681324935577810
18	127138303030260258
19	1011227775808000450
20	14280379156264610778
21	276342548314653322270
22	12566141342987866203746

[1, 0, 0, 6, 8, 130, 342, 2590, 21240, 167730, 1874930, 46128610, 417338462, 5163377570, 542567363366, 3984766703746, 42736508056760, 681324935577810, 127138303030260258, 1011227775808000450, 14280379156264610778, 276342548314653322270, 12566141342987866203746]

cp's OEIS Frontend

A382959 a(n) = (n!)^2 * [(x*y)^n] Product_{k>=1} (1 + (x^k + y^k)/k!).

Table of values

List of values