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A263969 as a simple table

n a(n)
1 20
2 72
3 1441
4 13856
5 189993
6 2215960
7 28027420
8 340646784
9 4224499865
10 51860834624
11 639939698625
12 7875999490880
13 97061605202532
14 1195356109670056
15 14726359450425633
16 181392031870723936
17 2234494271219028681

[20,72,1441,13856,189993,2215960,28027420,
 340646784,4224499865,51860834624,639939698625,
 7875999490880,97061605202532,1195356109670056,
 14726359450425633,181392031870723936,
 2234494271219028681]

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Last modified March 29 01:36 EDT 2024. Contains 371264 sequences. (Running on oeis4.)