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A015451 as a simple table

na(n)
01
11
27
343
4265
51633
610063
762011
8382129
92354785
1014510839
1189419819
12551029753
133395598337
1420924619775
15128943316987
16794584521697
174896450447169
1830173287204711
19185936173675435
201145790329257321

[1,1,7,43,265,1633,10063,62011,382129,2354785,
 14510839,89419819,551029753,3395598337,
 20924619775,128943316987,794584521697,
 4896450447169,30173287204711,185936173675435,
 1145790329257321]