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A270670 as a simple table

n a(n)
0 1
1 1
2 4
3 31
4 168
5 1841
6 18600
7 221845
8 2655408
9 44969041
10 703172880
11 11894018621
12 231354830520
13 4504644624793
14 100890401218152
15 2370351246834901
16 55456622199548640
17 1400307612079837985
18 39002429830457675808
19 1058964187034314179181
20 32049467535091477285800

[1,1,4,31,168,1841,18600,221845,2655408,44969041,
 703172880,11894018621,231354830520,4504644624793,
 100890401218152,2370351246834901,
 55456622199548640,1400307612079837985,
 39002429830457675808,1058964187034314179181,
 32049467535091477285800]

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Last modified February 27 16:21 EST 2024. Contains 370378 sequences. (Running on oeis4.)