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A167128 as a simple table

na(n)
11
21
32
41
512
65
71
856
984
1015
111
12240
131025
14510
1552
161
17992
1810980
1912155
203030
21203
221
234032
24109865
25250250
26119700
2718396
28877
291
3016256
311056804
324754295
334037250
341093526
35115892
364140
371
3865280
399925025
4085866270
41125131902
4254634608

[1,1,2,1,12,5,1,56,84,15,1,240,1025,510,52,1,992,
 10980,12155,3030,203,1,4032,109865,250250,119700,
 18396,877,1,16256,1056804,4754295,4037250,1093526,
 115892,4140,1,65280,9925025,85866270,125131902,
 54634608]