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A178935 as a simple table

n a(n)
0 0
1 1
2 6
3 27
4 121
5 517
6 2166
7 8955
8 36697
9 149413
10 605526
11 2445723
12 9853753
13 39627589
14 159148086
15 638505531
16 2559761689
17 10256265445
18 41076717846
19 164461839579
20 658312262905
21 2634643765381
22 10542759202806
23 42183589235067
24 168772014211801
25 675201028661797

[0,1,6,27,121,517,2166,8955,36697,149413,605526,
 2445723,9853753,39627589,159148086,638505531,
 2559761689,10256265445,41076717846,164461839579,
 658312262905,2634643765381,10542759202806,
 42183589235067,168772014211801,675201028661797]

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Last modified January 19 00:03 EST 2021. Contains 340262 sequences. (Running on oeis4.)