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A012196 as a simple table

na(n)
01
1-3
257
3-2419
4198801
5-25335395
64816346441
7-1245230547347
8427817295559329
9-186336568593526211
10101138532707457916121
11-66575531182102753799603
1252444802490227536269748273

[1,-3,57,-2419,198801,-25335395,4816346441,
 -1245230547347,427817295559329,
 -186336568593526211,101138532707457916121,
 -66575531182102753799603,
 52444802490227536269748273]