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A144069 as a simple table

na(n)
01
15
240
3285
42020
513876
693885
7624480
84100470
926609290
10170940381
111088260190
126872684570
1343088845030
14268374618310
151661512492031
1610229763359245
1762663268647185
18382039881168240
192318974249801205
2014018511922088296
2184418983571948025

[1,5,40,285,2020,13876,93885,624480,4100470,
 26609290,170940381,1088260190,6872684570,
 43088845030,268374618310,1661512492031,
 10229763359245,62663268647185,382039881168240,
 2318974249801205,14018511922088296,
 84418983571948025]