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A068071 as a simple table

na(n)
11
23
36
410
555
666
7210
8253
9666
10780
114851
128911
1315400
1417766
15125751
16303810
17407253
18906531
191125750
202648451
215925403
226706953
2315772536
2422207780
2550085036
2678406503
27438094800
281623331710
291764803755
303437158416

[1,3,6,10,55,66,210,253,666,780,4851,8911,15400,
 17766,125751,303810,407253,906531,1125750,2648451,
 5925403,6706953,15772536,22207780,50085036,
 78406503,438094800,1623331710,1764803755,
 3437158416]