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A003149 as a simple table

n a(n)
0 1
1 2
2 5
3 16
4 64
5 312
6 1812
7 12288
8 95616
9 840960
10 8254080
11 89441280
12 1060369920
13 13649610240
14 189550368000
15 2824077312000
16 44927447040000
17 760034451456000
18 13622700994560000
19 257872110354432000
20 5140559166898176000
21 107637093007589376000
22 2361827297364885504000

[1,2,5,16,64,312,1812,12288,95616,840960,8254080,
 89441280,1060369920,13649610240,189550368000,
 2824077312000,44927447040000,760034451456000,
 13622700994560000,257872110354432000,
 5140559166898176000,107637093007589376000,
 2361827297364885504000]

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Last modified March 18 22:56 EDT 2024. Contains 370952 sequences. (Running on oeis4.)