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A002748 as a simple table

na(n)
01
12
23
326
413
51074
6-1457
761802
87929
94218722
10-6385349
11934344762
12-5065189307
13141111736466
14235257551943
1523219206152074
16-97011062913167
1711887164842925762
18-91890238533000461
194819930221202545242
20-14547510704199530499
211184314832978574919922

[1,2,3,26,13,1074,-1457,61802,7929,4218722,
 -6385349,934344762,-5065189307,141111736466,
 235257551943,23219206152074,-97011062913167,
 11887164842925762,-91890238533000461,
 4819930221202545242,-14547510704199530499,
 1184314832978574919922]