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A156705 as a simple table

na(n)
01
1-9
2-70
34509
430170
5-1671849
6-33017110
710288405413
867607285690
9-6774813697599
10-222549868079350
1154517401073397079
121074501236150606810
13-155538551845927881549
14-7152956142185399429590
159557732764973420897505381
1662791988710527474778497530

[1,-9,-70,4509,30170,-1671849,-33017110,
 10288405413,67607285690,-6774813697599,
 -222549868079350,54517401073397079,
 1074501236150606810,-155538551845927881549,
 -7152956142185399429590,9557732764973420897505381,
 62791988710527474778497530]