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A235549 as a simple table

na(n)
116
246
3120
4288
5660
61456
73136
86624
913808
1028480
1158304
12118656
13240448
14485632
15978432
161967616
173951360
187926784
1915889408
2031832064
2163742976
22127602688
23255377408
24511008768
251022390272
262045329408
274091461632
288184102912

[16,46,120,288,660,1456,3136,6624,13808,28480,
 58304,118656,240448,485632,978432,1967616,3951360,
 7926784,15889408,31832064,63742976,127602688,
 255377408,511008768,1022390272,2045329408,
 4091461632,8184102912]