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A270892 as a simple table

na(n)
01
14
228
3136
4600
52680
611448
747188
8192612
9779772
103142520
1112628508
1250661504
13203032708
14813165672
153255505980

[1,4,28,136,600,2680,11448,47188,192612,779772,
 3142520,12628508,50661504,203032708,813165672,
 3255505980]