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A098939 as a simple table

n a(n)
0 -2
1 -1
2 177145
3 1977326741
4 8649755859373
5 25408476896404829
6 62050608388552823485
7 138624799340320978519421
8 296443535898840969287109373
9 620340165367069806017523226109
10 1284197945649659948122178573052925

[-2,-1,177145,1977326741,8649755859373,
 25408476896404829,62050608388552823485,
 138624799340320978519421,
 296443535898840969287109373,
 620340165367069806017523226109,
 1284197945649659948122178573052925]

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Last modified January 18 11:57 EST 2022. Contains 350455 sequences. (Running on oeis4.)