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A018045 as a simple table

na(n)
01
12
28
324
469
5199
6576
71661
84792
913824
1039875
11115020
12331776
13957007
142760487
157962624
1622968182
1766251701
18191102976
19551236370
201590040835
214586471424
2213229672880
2338160980055
24110075314176
25317512149143
26915863521339
272641807540224
287620291579445

[1,2,8,24,69,199,576,1661,4792,13824,39875,115020,
 331776,957007,2760487,7962624,22968182,66251701,
 191102976,551236370,1590040835,4586471424,
 13229672880,38160980055,110075314176,317512149143,
 915863521339,2641807540224,7620291579445]