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A224514 as a simple table

na(n)
01
12
26
320
470
5251
6911
73327
812190
944744
10164407
11604487
122223504
138181175
1430108147
15110820165
16407946421
171501844193
185529362694
1920358557249
2074961030414
21276017648570
221016360893036
233742540945813
2413781324308298
2550748099850042

[1,2,6,20,70,251,911,3327,12190,44744,164407,
 604487,2223504,8181175,30108147,110820165,
 407946421,1501844193,5529362694,20358557249,
 74961030414,276017648570,1016360893036,
 3742540945813,13781324308298,50748099850042]