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A060346 as a simple table

na(n)
0-1
1-3
2-11
3-217
4-889
5-6207
6-395583
7-11872529
8-51190172
9-3320575453
10-71855148782
11-1138862383991
12-73603597626136
13-585764974480039
14-5810293262069806
15-9158417736096173491
16-75787432383189077231
17-289633090947850663933

[-1,-3,-11,-217,-889,-6207,-395583,-11872529,
 -51190172,-3320575453,-71855148782,-1138862383991,
 -73603597626136,-585764974480039,
 -5810293262069806,-9158417736096173491,
 -75787432383189077231,-289633090947850663933]