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A307793 as a simple table

na(n)
11
21
33
47
524
649
7205
8411
91668
105011
1120095
1240191
13241372
14482745
151931393
167725627
1738629803
1877259607
19463562851
20927125703
215562774334
2222251097753
2389004431205
24178008862411
251424071142304
264272213426961
2717088854190591
2868355416767375
29410132502535664
30820265005071329

[1,1,3,7,24,49,205,411,1668,5011,20095,40191,
 241372,482745,1931393,7725627,38629803,77259607,
 463562851,927125703,5562774334,22251097753,
 89004431205,178008862411,1424071142304,
 4272213426961,17088854190591,68355416767375,
 410132502535664,820265005071329]