A253402 - OEIS

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A253402 as a simple table

n	a(n)
1	2890
2	8168
3	27362
4	108950
5	367348
6	1489310
7	5662124
8	19137326
9	76649188
10	290244550
11	999559200
12	3957740954
13	14871518668
14	52003849470
15	204576756391
16	762458041400
17	2701018996090
18	10554526115684
19	39120811735708

[2890,8168,27362,108950,367348,1489310,5662124, 19137326,76649188,290244550,999559200,3957740954, 14871518668,52003849470,204576756391,762458041400, 2701018996090,10554526115684,39120811735708]