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A303326 as a simple table

na(n)
18
22
38
42
512
610
746
850
9204
10290
111034
121682
135458
149802
1529582
1657122
17163166
18332930
19911976
201940450
215149146
2211309770
2329300080
2465918162
25167721900
26384199202
27964447184
282239277042
295564863708
3013051463050
3132192084054

[8,2,8,2,12,10,46,50,204,290,1034,1682,5458,9802,
 29582,57122,163166,332930,911976,1940450,5149146,
 11309770,29300080,65918162,167721900,384199202,
 964447184,2239277042,5564863708,13051463050,
 32192084054]