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A129271 as a simple table

n a(n)
0 1
1 1
2 1
3 4
4 31
5 347
6 4956
7 85102
8 1698712
9 38562309
10 980107840
11 27559801736
12 849285938304
13 28459975589311
14 1030366840792576
15 40079074477640850
16 1666985134587145216
17 73827334760713500233
18 3468746291121007607808
19 172335499299097826575564
20 9027150377126199463936000

[1,1,1,4,31,347,4956,85102,1698712,38562309,
 980107840,27559801736,849285938304,28459975589311,
 1030366840792576,40079074477640850,
 1666985134587145216,73827334760713500233,
 3468746291121007607808,172335499299097826575564,
 9027150377126199463936000]

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Last modified April 24 18:17 EDT 2024. Contains 371962 sequences. (Running on oeis4.)