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A007576 as a simple table

na(n)
01
11
21
33
47
515
635
787
8217
9547
101417
113735
129911
1326513
1471581
15194681
16532481
171464029
184045117
1911225159
2031268577
2187404465
22245101771
23689323849
241943817227
255494808425
2615568077235
2744200775239
28125739619467

[1,1,1,3,7,15,35,87,217,547,1417,3735,9911,26513,
 71581,194681,532481,1464029,4045117,11225159,
 31268577,87404465,245101771,689323849,1943817227,
 5494808425,15568077235,44200775239,125739619467]