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A374341 as a simple table

na(n)
01
11
2-3
315
4259
51608
61582152
7157042600
811778545664
93336975844504
10440384712302421

[1,1,-3,15,259,1608,1582152,157042600,11778545664,
 3336975844504,440384712302421]