A231460 - OEIS

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A231460 as a simple table

n	a(n)
1	33
2	90
3	311
4	1096
5	4138
6	16384
7	67189
8	280852
9	1195147
10	5145988
11	22393436
12	98203218
13	433447413
14	1922772634
15	8563359553
16	38258390042
17	171345914564
18	768880010838
19	3455375274145
20	15546790384874
21	70013535581867

[33,90,311,1096,4138,16384,67189,280852,1195147, 5145988,22393436,98203218,433447413,1922772634, 8563359553,38258390042,171345914564,768880010838, 3455375274145,15546790384874,70013535581867]