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A280891 as a simple table

na(n)
11
24
312
437
5118
6387
71298
84433
915366
1053924
11191216
12684114
132466428
148951945
1532683230
16119949945
17442281030
181637618400
196086481720
2022699003830
2184918443220
22318593346630
231198421583684
244518886787802
2517077448924828
2664671604514552
27245380598678208
28932708665735364
293551238550341944
3013542393822575541

[1,4,12,37,118,387,1298,4433,15366,53924,191216,
 684114,2466428,8951945,32683230,119949945,
 442281030,1637618400,6086481720,22699003830,
 84918443220,318593346630,1198421583684,
 4518886787802,17077448924828,64671604514552,
 245380598678208,932708665735364,3551238550341944,
 13542393822575541]