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A236987 as a simple table

na(n)
1256
2888
3888
43000
53852
63000
711388
816212
916212
1011388
1143096
1285064
1378976
1485064
1543096
16171036
17429108
18556322
19556322
20429108
21171036
22680872
232380742
243448154
256304776
263448154
272380742
28680872
292770540
3012891190
3126255552

[256,888,888,3000,3852,3000,11388,16212,16212,
 11388,43096,85064,78976,85064,43096,171036,429108,
 556322,556322,429108,171036,680872,2380742,
 3448154,6304776,3448154,2380742,680872,2770540,
 12891190,26255552]