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A157015 as a simple table

n a(n)
0 0
1 1
2 2
3 3
4 8
5 18
6 60
7 232
8 1389
9 14174
10 291396
11 12307993
12 1031244083
13 166112993730
14 50667178220215
15 29104660317374991
16 31455540471012663839
17 64032442292149795841796
18 245999865227419158171980939
19 1787823661072649054474456291897
20 24639596830978183991220162941946112

[0,1,2,3,8,18,60,232,1389,14174,291396,12307993,
 1031244083,166112993730,50667178220215,
 29104660317374991,31455540471012663839,
 64032442292149795841796,
 245999865227419158171980939,
 1787823661072649054474456291897,
 24639596830978183991220162941946112]

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Last modified May 6 18:59 EDT 2024. Contains 372297 sequences. (Running on oeis4.)