A303893 - OEIS

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A303893 as a simple table

n	a(n)
1	3
2	313
3	842
4	7421
5	29479
6	200144
7	992789
8	5930552
9	32529473
10	183511110
11	1040095115
12	5814425752
13	32991537449
14	185215371545
15	1046962946963
16	5898040401117
17	33274465102765
18	187679674103195
19	1058350295231955

[3,313,842,7421,29479,200144,992789,5930552, 32529473,183511110,1040095115,5814425752, 32991537449,185215371545,1046962946963, 5898040401117,33274465102765,187679674103195, 1058350295231955]