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A306504 as a simple table

n a(n)
0 1
1 2
2 5
3 16
4 46
5 128
6 366
7 1048
8 2983
9 8498
10 24235
11 69088
12 196924
13 561360
14 1600252
15 4561680
16 13003565
17 37068242
18 105667377
19 301217072
20 858654442
21 2447694896
22 6977439850
23 19890006440
24 56698785235
25 161626505250
26 460735217111
27 1313379512256
28 3743941595128
29 10672542499296

[1,2,5,16,46,128,366,1048,2983,8498,24235,69088,
 196924,561360,1600252,4561680,13003565,37068242,
 105667377,301217072,858654442,2447694896,
 6977439850,19890006440,56698785235,161626505250,
 460735217111,1313379512256,3743941595128,
 10672542499296]

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Last modified February 24 22:57 EST 2020. Contains 332216 sequences. (Running on oeis4.)