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A231181 as a simple table

na(n)
01
11
25
36
420
527
675
7110
8275
9429
101001
111637
123639
136172
1413243
1523104
1648280
1786090
18176341
19319792
20645150
211185305
222363596
234386331
248669142
2516212913
2631825005
2759873834
28116914020
29220964744
30429737220
31815057639
321580244061

[1,1,5,6,20,27,75,110,275,429,1001,1637,3639,6172,
 13243,23104,48280,86090,176341,319792,645150,
 1185305,2363596,4386331,8669142,16212913,31825005,
 59873834,116914020,220964744,429737220,815057639,
 1580244061]