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A013521 as a simple table

n a(n)
0 1
1 -1
2 -7
3 -97
4 -2063
5 -17803
6 -250781
7 166831871
8 43685848289
9 447550424579
10 84677077231169
11 11657476758734011
12 28924058075775365981
13 44287070229737735633567
14 305190813989360271816409

[1,-1,-7,-97,-2063,-17803,-250781,166831871,
 43685848289,447550424579,84677077231169,
 11657476758734011,28924058075775365981,
 44287070229737735633567,305190813989360271816409]

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Last modified November 27 07:58 EST 2022. Contains 358362 sequences. (Running on oeis4.)