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A009206 as a simple table

n a(n)
0 0
1 1
2 2
3 3
4 0
5 -15
6 -48
7 -21
8 448
9 1953
10 640
11 -32461
12 -152064
13 77649
14 4331264
15 18557595
16 -46686208
17 -894805183
18 -2948087808
19 21405607651
20 254321049600
21 421226202033
22 -10904188190720
23 -90171090228021
24 96102216892416
25 6418365899545825

[0,1,2,3,0,-15,-48,-21,448,1953,640,-32461,
 -152064,77649,4331264,18557595,-46686208,
 -894805183,-2948087808,21405607651,254321049600,
 421226202033,-10904188190720,-90171090228021,
 96102216892416,6418365899545825]

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Last modified May 13 14:08 EDT 2024. Contains 372519 sequences. (Running on oeis4.)