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A228755 as a simple table

na(n)
14
28
339
4126
5482
61712
76277
822700
982580
10299648
111088499
123952186
1314352786
1452119040
15189266297
16687294648
172495834292
189063317432
1932912374319
20119517358582
21434013128786
221576067091632
235723300581661
2420783486354532

[4,8,39,126,482,1712,6277,22700,82580,299648,
 1088499,3952186,14352786,52119040,189266297,
 687294648,2495834292,9063317432,32912374319,
 119517358582,434013128786,1576067091632,
 5723300581661,20783486354532]