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A009271 as a simple table

n a(n)
0 1
1 2
2 8
3 62
4 968
5 9962
6 557108
7 -202018
8 851334128
9 16341130322
10 -6757456189972
11 2480221403307782
12 -678177401929552792
13 194099813539570880762
14 -58073452241962644117532
15 18437894946039087568249262

[1,2,8,62,968,9962,557108,-202018,851334128,
 16341130322,-6757456189972,2480221403307782,
 -678177401929552792,194099813539570880762,
 -58073452241962644117532,
 18437894946039087568249262]

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Last modified August 4 10:06 EDT 2021. Contains 346447 sequences. (Running on oeis4.)