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A145455 as a simple table

na(n)
01
10
20
30
40
51
66
721
856
9126
10378
113234
1234056
13289575
142020018
1512237225
1670634928
17468041756
184190274648
1945557515620
20499503011496
215121432107757
2249183015347774
23462331794763069
244579813478536296
2550959878972009546

[1,0,0,0,0,1,6,21,56,126,378,3234,34056,289575,
 2020018,12237225,70634928,468041756,4190274648,
 45557515620,499503011496,5121432107757,
 49183015347774,462331794763069,4579813478536296,
 50959878972009546]