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A136503 as a simple table

na(n)
01
1-4
226
3-308
46959
5-306888
626732904
7-4628215312
81597488685120
9-1101039613155676
101516536435306750724
11-4175994577753360618608
1222993788379965461938093352
13-253190775338116964702467771168

[1,-4,26,-308,6959,-306888,26732904,-4628215312,
 1597488685120,-1101039613155676,
 1516536435306750724,-4175994577753360618608,
 22993788379965461938093352,
 -253190775338116964702467771168]