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A223919 as a simple table

na(n)
16
236
3158
4548
51600
64102
79503
820299
940570
1076704
11138348
12239630
13400700
14649642
151024813
161577669
172376142
183508636
195088714
207260552
2110205240
2214148014
2319366507
2426200111
2535060546
2646443736
2760943096
2879264338

[6,36,158,548,1600,4102,9503,20299,40570,76704,
 138348,239630,400700,649642,1024813,1577669,
 2376142,3508636,5088714,7260552,10205240,14148014,
 19366507,26200111,35060546,46443736,60943096,
 79264338]