A013098 - OEIS

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A013098 as a simple table

n	a(n)
0	2
1	-15
2	457
3	-30289
4	3469345
5	-608926329
6	151766090881
7	-50946876706129
8	22157750605438913
9	-12118460218882345193
10	8139938757873193425313
11	-6587354373887296232631681
12	6321346340322177807347908193

[2,-15,457,-30289,3469345,-608926329,151766090881, -50946876706129,22157750605438913, -12118460218882345193,8139938757873193425313, -6587354373887296232631681, 6321346340322177807347908193]