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A045474 as a simple table

na(n)
14
28
314
424
542
676
7138
8254
9470
10876
111638
123070
135766
1410850
1520436
1638550
1772806
18137670
19260612
20493824
21936690
221778360
233379372
246427190
2512232928
2623300652
2744414366
2884713872
29161686324
30308780220

[4,8,14,24,42,76,138,254,470,876,1638,3070,5766,
 10850,20436,38550,72806,137670,260612,493824,
 936690,1778360,3379372,6427190,12232928,23300652,
 44414366,84713872,161686324,308780220]