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A022653 as a simple table

na(n)
01
125
2350
33625
430825
5227005
61495225
78998625
850231225
9262982425
101302361670
116141852925
1227731605150
13120415590250
14504692324800
152048151994275
168069513499800
1730937269482500
18115647629802975

[1,25,350,3625,30825,227005,1495225,8998625,
 50231225,262982425,1302361670,6141852925,
 27731605150,120415590250,504692324800,
 2048151994275,8069513499800,30937269482500,
 115647629802975]