A328814 - cp's OEIS frontend

A328814 Constant term in the expansion of (-2 + Product_{k=1..n} (1 + x_k) + Product_{k=1..n} (1 + 1/x_k))^n.

n	a(n)
0	1
1	0
2	6
3	72
4	6690
5	1536000
6	1398496680
7	4165565871600
8	48724656010825410
9	1991141239554487077120
10	325362786100184356140612996
11	190695111051826003327799496771600
12	452459020719698368348441955010421696800

[1, 0, 6, 72, 6690, 1536000, 1398496680, 4165565871600, 48724656010825410, 1991141239554487077120, 325362786100184356140612996, 190695111051826003327799496771600, 452459020719698368348441955010421696800]

cp's OEIS Frontend

A328814 Constant term in the expansion of (-2 + Product_{k=1..n} (1 + x_k) + Product_{k=1..n} (1 + 1/x_k))^n.

Table of values

List of values