A259949 - OEIS

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A259949 as a simple table

n	a(n)
1	801
2	4128
3	30351
4	141619
5	631626
6	3451108
7	18564547
8	92159926
9	465579244
10	2426793925
11	12493718508
12	63615992133
13	326137871580
14	1677931148622
15	8603497730864
16	44072130840744
17	226114843492646
18	1160274814296495

[801,4128,30351,141619,631626,3451108,18564547, 92159926,465579244,2426793925,12493718508, 63615992133,326137871580,1677931148622, 8603497730864,44072130840744,226114843492646, 1160274814296495]