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A317600 as a simple table

na(n)
18
265
3435
43047
520805
6143866
7994993
86892556
947747495
10330696013
112290523877
1215865339426
13109889859960
14761143341606
155272010289643
1636516212627935
17252926973440552
181751881144044050
1912134283040744869
2084047266827333127

[8,65,435,3047,20805,143866,994993,6892556,
 47747495,330696013,2290523877,15865339426,
 109889859960,761143341606,5272010289643,
 36516212627935,252926973440552,1751881144044050,
 12134283040744869,84047266827333127]