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A135649 as a simple table

na(n)
1-1
2-59
3-2951
4-144881
5-7100318
6-347919854
7-17048087778
8-835356351147
9-40932461369999
10-2005690607714190
11-98278839782943427
12-4815663149532534269
13-235967494335111673276
14-11562407222812624781054
15-566557953937031952348408
16-27761339743856012706314735

[-1,-59,-2951,-144881,-7100318,-347919854,
 -17048087778,-835356351147,-40932461369999,
 -2005690607714190,-98278839782943427,
 -4815663149532534269,-235967494335111673276,
 -11562407222812624781054,
 -566557953937031952348408,
 -27761339743856012706314735]