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A144841 as a simple table

na(n)
11
21
32
411
541
6121
7316
8757
91961
106281
1122166
1274031
13221937
14596961
151460096
163294761
176945521
1813818417
1926161386
2047446611

[1,1,2,11,41,121,316,757,1961,6281,22166,74031,
 221937,596961,1460096,3294761,6945521,13818417,
 26161386,47446611]