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A137806 as a simple table

n a(n)
1 1
2 6
3 15
4 43
5 105
6 271
7 633
8 1501
9 3389
10 7598
11 16561
12 35710
13 75444
14 157618
15 324291
16 659949
17 1326571
18 2640033
19 5199264
20 10147142
21 19624563
22 37643761
23 71629723
24 135288468
25 253682683
26 472470635
27 874204574
28 1607506045
29 2938259227
30 5340032114
31 9651674965

[1,6,15,43,105,271,633,1501,3389,7598,16561,35710,
 75444,157618,324291,659949,1326571,2640033,
 5199264,10147142,19624563,37643761,71629723,
 135288468,253682683,472470635,874204574,
 1607506045,2938259227,5340032114,9651674965]

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Last modified July 28 00:54 EDT 2021. Contains 346316 sequences. (Running on oeis4.)