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A112619 as a simple table

na(n)
10
20
30
41
54
618
779
8326
91278
104875
1117978
1264720
13227842
14787546
152678207
168982754
1729761361
1897558039
19316778169
201019996738
213259673935
2210347077497
2332644696187
24102425388286
25319754805262

[0,0,0,1,4,18,79,326,1278,4875,17978,64720,227842,
 787546,2678207,8982754,29761361,97558039,
 316778169,1019996738,3259673935,10347077497,
 32644696187,102425388286,319754805262]