A064329 - OEIS

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A064329 as a simple table

n	a(n)
0	1
1	1
2	-6
3	85
4	-1490
5	29226
6	-614004
7	13511709
8	-307448490
9	7174776190
10	-170777485556
11	4130050311234
12	-101192982385844
13	2506610481299380
14	-62668163792277840
15	1579300030107459885
16	-40076101342241993370

[1,1,-6,85,-1490,29226,-614004,13511709, -307448490,7174776190,-170777485556,4130050311234, -101192982385844,2506610481299380, -62668163792277840,1579300030107459885, -40076101342241993370]