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A002703 as a simple table

na(n)
30
40
50
62
76
814
924
1046
1188
12162
13300
14562
151056
161982
173742
187082
1913438
2025574
2148768
2293198
23178480
24342392
25657918
261266202
272440318
284709374
299099504
3017602322
3134087010
3266076414
33128207976
34248983550
35483939976
36941362694
371832519262
383569842946
396958934352

[0,0,0,2,6,14,24,46,88,162,300,562,1056,1982,3742,
 7082,13438,25574,48768,93198,178480,342392,657918,
 1266202,2440318,4709374,9099504,17602322,34087010,
 66076414,128207976,248983550,483939976,941362694,
 1832519262,3569842946,6958934352]