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A073373 as a simple table

na(n)
01
14
218
360
4195
5576
61644
74488
811925
930860
1078278
11195012
12478599
131159080
142774880
156575280
1615439065
1735955540
1883118970
19190862860
20435601611
21988620624
222232236628
235016441240
2411224087965

[1,4,18,60,195,576,1644,4488,11925,30860,78278,
 195012,478599,1159080,2774880,6575280,15439065,
 35955540,83118970,190862860,435601611,988620624,
 2232236628,5016441240,11224087965]