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A176250 as a simple table

na(n)
02
11
21
31
41
511
611
712
812
979
1079
11347
12347
135541
145541
15-9206
16-9206
173307613
183307613
19-78393123
20-78393123
21932396477
22932396477
23-127419293864
24-127419293864
256013748071263
266013748071263

[2,1,1,1,1,11,11,12,12,79,79,347,347,5541,5541,
 -9206,-9206,3307613,3307613,-78393123,-78393123,
 932396477,932396477,-127419293864,-127419293864,
 6013748071263,6013748071263]