A213150 - OEIS

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A213150 as a simple table

n	a(n)
0	1
1	-7
2	-7
3	777
4	3129
5	-342615
6	-2965095
7	318612105
8	4810567545
9	-504410403735
10	-11895756971175
11	1209591806193225
12	41613411780711225
13	-4074816146460117975
14	-195459943548067129575
15	18284823353530418351625

[1,-7,-7,777,3129,-342615,-2965095,318612105, 4810567545,-504410403735,-11895756971175, 1209591806193225,41613411780711225, -4074816146460117975,-195459943548067129575, 18284823353530418351625]