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A320444 as a simple table

n a(n)
0 1
1 1
2 1
3 4
4 17
5 141
6 1297
7 17683
8 262145
9 4861405
10 100112001
11 2371816701
12 61917364225
13 1796326510993
14 56693912375297
15 1947734359001551
16 72059082110369793
17 2863257607266475419
18 121439531096594251777
19 5480987217944109919765
20 262144000000000000000001

[1,1,1,4,17,141,1297,17683,262145,4861405,
 100112001,2371816701,61917364225,1796326510993,
 56693912375297,1947734359001551,72059082110369793,
 2863257607266475419,121439531096594251777,
 5480987217944109919765,262144000000000000000001]

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Last modified January 26 01:48 EST 2020. Contains 331270 sequences. (Running on oeis4.)