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A053731 as a simple table

na(n)
10
20
30
40
50
60
70
81
91
105
1115
1242
1399
14215
15429
16805
171430
182431
193978
206299
219690
2214535
2321318
2430645
2543263
2660088
2782225
28111004
29148005
30195098
31254475
32328697
33420732
34534006
35672452
36840565
371043460
381286934
391577532
401922618

[0,0,0,0,0,0,0,1,1,5,15,42,99,215,429,805,1430,
 2431,3978,6299,9690,14535,21318,30645,43263,60088,
 82225,111004,148005,195098,254475,328697,420732,
 534006,672452,840565,1043460,1286934,1577532,
 1922618]