A003710 - OEIS

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A003710 as a simple table

n	a(n)
0	1
1	-1
2	-7
3	-97
4	-2063
5	-53409
6	-752343
7	166831871
8	43685848289
9	9398558916159
10	2116926930779225
11	524586454143030495
12	144620290378876829905
13	44287070229737735633567
14	14954349885478653319004041

[1,-1,-7,-97,-2063,-53409,-752343,166831871, 43685848289,9398558916159,2116926930779225, 524586454143030495,144620290378876829905, 44287070229737735633567, 14954349885478653319004041]