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A009648 as a simple table

n a(n)
0 0
1 1
2 -3
3 10
4 -44
5 255
6 -1841
7 15818
8 -156960
9 1762709
10 -22076535
11 304867506
12 -4600188108
13 75280188035
14 -1327718893749
15 25103478695090
16 -506480711742496
17 10860420245412873
18 -246630317697276235
19 5912837973247721914

[0,1,-3,10,-44,255,-1841,15818,-156960,1762709,
 -22076535,304867506,-4600188108,75280188035,
 -1327718893749,25103478695090,-506480711742496,
 10860420245412873,-246630317697276235,
 5912837973247721914]

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Last modified April 16 12:52 EDT 2024. Contains 371711 sequences. (Running on oeis4.)