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A121988 as a simple table

na(n)
00
11
22
36
421
580
6322
71348
85814
925674
10115566
11528528
122449746
1311485068
1454377288
15259663576
161249249981
176049846848
1829469261934
19144293491564
20709806846980
213506278661820
2217385618278700
2386500622296800
24431718990188850
252160826237261692

[0,1,2,6,21,80,322,1348,5814,25674,115566,528528,
 2449746,11485068,54377288,259663576,1249249981,
 6049846848,29469261934,144293491564,709806846980,
 3506278661820,17385618278700,86500622296800,
 431718990188850,2160826237261692]