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A253880 as a simple table

n a(n)
1 1
2 253
3 64261
4 16322041
5 4145734153
6 1053000152821
7 267457893082381
8 67933251842771953
9 17254778510170993681
10 4382645808331589623021
11 1113174780537713593253653
12 282742011610770921096804841
13 71815357774355276244995175961
14 18240818132674629395307677889253

[1,253,64261,16322041,4145734153,1053000152821,
 267457893082381,67933251842771953,
 17254778510170993681,4382645808331589623021,
 1113174780537713593253653,
 282742011610770921096804841,
 71815357774355276244995175961,
 18240818132674629395307677889253]

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Last modified January 27 14:07 EST 2021. Contains 340467 sequences. (Running on oeis4.)