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A183976 as a simple table

na(n)
1128
2992
3992
47688
513168
67688
764976
8180236
9180236
1064976
11549152
122735260
134470575
142735260
15549152
164780976
1741834260
18124987628
19124987628
2041834260
214780976
2241623688
23664848772
243536846184
256533126804
263536846184
27664848772

[128,992,992,7688,13168,7688,64976,180236,180236,
 64976,549152,2735260,4470575,2735260,549152,
 4780976,41834260,124987628,124987628,41834260,
 4780976,41623688,664848772,3536846184,6533126804,
 3536846184,664848772]