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A049964 as a simple table

na(n)
11
23
31
46
512
624
748
8107
9250
10453
11906
121823
133682
147566
1515788
1634352
1780810
18145833
19291666
20583343
211166722
222333646
234667948
249338672
2518689450
2637443922
2775098700
28151072456
29305646138
30625313778
311307036806
322844621050
336690632768
3412074228731
3524148457462
3648296914935
3796593829906

[1,3,1,6,12,24,48,107,250,453,906,1823,3682,7566,
 15788,34352,80810,145833,291666,583343,1166722,
 2333646,4667948,9338672,18689450,37443922,
 75098700,151072456,305646138,625313778,1307036806,
 2844621050,6690632768,12074228731,24148457462,
 48296914935,96593829906]