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A180256 as a simple table

na(n)
11
21
33
412
556
6290
71626
89735
961709
10411840
112882513
1221095851
13161056199
141280069731
1510572507465
1690590477793
17804013429416
187380298477188
1969968725915172
20684193449404263
216892242071154495
2271440857358236502

[1,1,3,12,56,290,1626,9735,61709,411840,2882513,
 21095851,161056199,1280069731,10572507465,
 90590477793,804013429416,7380298477188,
 69968725915172,684193449404263,6892242071154495,
 71440857358236502]