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A147996 as a simple table

na(n)
1-7
2-27
3-123
4-567
5-2211
6-2727
784477
81485513
918362109
10200535993
112059226877
1220397799593
13197430536829
141880870895513
1517715781956477
16165457407809673
171535334245693949
1814175044463955833
19130346379428513277

[-7,-27,-123,-567,-2211,-2727,84477,1485513,
 18362109,200535993,2059226877,20397799593,
 197430536829,1880870895513,17715781956477,
 165457407809673,1535334245693949,
 14175044463955833,130346379428513277]