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A301908 as a simple table

na(n)
18
21
37
45
58
640
796
8316
91078
103831
1113331
1246127
13161362
14564617
151975369
166914911
1724216868
1884826850
19297130258
201040826424
213646117344
2212772898193
2344745724111
24156753135377
25549139791596
261923758528089
276739359943131

[8,1,7,5,8,40,96,316,1078,3831,13331,46127,161362,
 564617,1975369,6914911,24216868,84826850,
 297130258,1040826424,3646117344,12772898193,
 44745724111,156753135377,549139791596,
 1923758528089,6739359943131]