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A024028 as a simple table

na(n)
01
12
2-23
3-216
4-943
5-2882
6-7047
7-14620
8-26207
9-39366
10-40951
1116096
12282609
131223030
144245145
1513589532
1641998145
17127720306
18385530921
191159785368
203483584401

[1,2,-23,-216,-943,-2882,-7047,-14620,-26207,
 -39366,-40951,16096,282609,1223030,4245145,
 13589532,41998145,127720306,385530921,1159785368,
 3483584401]