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A280486 as a simple table

na(n)
01
11
24
38
420
536
686
7150
8314
9564
101088
111902
123557
136085
1410902
1518506
1632124
1753584
1891133
19149749
20249315
21405121
22662582
231063152
241714580
252719842
264327302
276797316
2810686005
2916622003
3025861855
3139866017
3261422891
3393910783
34143406552
35217537696

[1,1,4,8,20,36,86,150,314,564,1088,1902,3557,6085,
 10902,18506,32124,53584,91133,149749,249315,
 405121,662582,1063152,1714580,2719842,4327302,
 6797316,10686005,16622003,25861855,39866017,
 61422891,93910783,143406552,217537696]