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A007191 as a simple table

na(n)
-11
0-24
1276
2-2048
311202
4-49152
5184024
6-614400
71881471
8-5373952
914478180
10-37122048
1191231550
12-216072192
13495248952
14-1102430208
152390434947
16-5061476352
1710487167336
18-21301241856
1942481784514
20-83300614144

[1,-24,276,-2048,11202,-49152,184024,-614400,
 1881471,-5373952,14478180,-37122048,91231550,
 -216072192,495248952,-1102430208,2390434947,
 -5061476352,10487167336,-21301241856,42481784514,
 -83300614144]