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A101091 as a simple table

na(n)
11
220
3155
4760
52814
68592
722770
854120
9117975
10239668
11459173
12837200
131463020
142464320
154019412
166372144
179849885
1814884980
1922040095
2032037896
2145795530
2264464400
2389475750
24122592600
25165968595
26222214356
27294471945
28386498080

[1,20,155,760,2814,8592,22770,54120,117975,239668,
 459173,837200,1463020,2464320,4019412,6372144,
 9849885,14884980,22040095,32037896,45795530,
 64464400,89475750,122592600,165968595,222214356,
 294471945,386498080]