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A349854 as a simple table

na(n)
00
11
27
312
414
549
613
78
8596
9-1967
104011
119764
12-128878
13664545
14-1837695
15-2388448
1667004968
17-478198239
181994890287
19-1669470404
20-56929813514
21615188040657
22-3794477505067
2312028579020088
2450780206473820
25-1172949397923535
2610766410530764819
27-61183127006113196

[0,1,7,12,14,49,13,8,596,-1967,4011,9764,-128878,
 664545,-1837695,-2388448,67004968,-478198239,
 1994890287,-1669470404,-56929813514,615188040657,
 -3794477505067,12028579020088,50780206473820,
 -1172949397923535,10766410530764819,
 -61183127006113196]