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A047177 as a simple table

na(n)
10
20
30
40
51
64
712
830
960
10121
11205
12385
13630
141260
152156
164711
178260
1818340
1931620
2068772
21115995
22250185
23418825
24914485
251535391
263405402
275728086
2812788516
2921448791
3047902764
3180006668
32178864378
33298009048
34668688388

[0,0,0,0,1,4,12,30,60,121,205,385,630,1260,2156,
 4711,8260,18340,31620,68772,115995,250185,418825,
 914485,1535391,3405402,5728086,12788516,21448791,
 47902764,80006668,178864378,298009048,668688388]