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A138238 as a simple table

n a(n)
0 0
1 1
2 0
3 9
4 -16
5 105
6 -336
7 1513
8 -5712
9 23529
10 -92752
11 373737
12 -1489488
13 5968873
14 -23853648
15 95458281
16 -381745744
17 1527157737
18 -6108281424
19 24433824745
20 -97733900880
21 390938399721
22 -1563748006480

[0,1,0,9,-16,105,-336,1513,-5712,23529,-92752,
 373737,-1489488,5968873,-23853648,95458281,
 -381745744,1527157737,-6108281424,24433824745,
 -97733900880,390938399721,-1563748006480]

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Last modified January 22 18:12 EST 2022. Contains 350484 sequences. (Running on oeis4.)