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A212323 as a simple table

n a(n)
0 1
1 2
2 8
3 25
4 78
5 238
6 721
7 2174
8 6540
9 19649
10 58994
11 177058
12 531297
13 1594090
14 4782592
15 14348297
16 43045734
17 129138566
18 387417905
19 1162257286
20 3486777636
21 10460342257
22 31381041898
23 94143150170
24 282429490113
25 847288534418
26 2541865706936
27 7625597288569

[1,2,8,25,78,238,721,2174,6540,19649,58994,177058,
 531297,1594090,4782592,14348297,43045734,
 129138566,387417905,1162257286,3486777636,
 10460342257,31381041898,94143150170,282429490113,
 847288534418,2541865706936,7625597288569]

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Last modified December 8 02:30 EST 2019. Contains 329850 sequences. (Running on oeis4.)