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A143927 as a simple table

n a(n)
0 1
1 2
2 7
3 28
4 123
5 572
6 2769
7 13806
8 70414
9 365636
10 1926505
11 10273870
12 55349155
13 300783420
14 1646828655
15 9075674700
16 50304255210
17 280248358964
18 1568399676946
19 8813424968192
20 49709017472751
21 281306750922072
22 1596802663432503

[1,2,7,28,123,572,2769,13806,70414,365636,1926505,
 10273870,55349155,300783420,1646828655,9075674700,
 50304255210,280248358964,1568399676946,
 8813424968192,49709017472751,281306750922072,
 1596802663432503]

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Last modified March 28 14:13 EDT 2024. Contains 371254 sequences. (Running on oeis4.)