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A272832 as a simple table

na(n)
01
15
221
385
4377
51633
66929
728945
8119537
9489553
101992689
118074705
1232611697
13131387473
14528376049
152121990865

[1,5,21,85,377,1633,6929,28945,119537,489553,
 1992689,8074705,32611697,131387473,528376049,
 2121990865]