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A117161 as a simple table

na(n)
11
21
33
46
515
631
773
8157
9358
10785
111762
123896
138702
1419299
1542995
1695507
17212552
18472445
191050973
202336670
215197036
2211556157
2325700188
2457150018
25127093805
26282627186
27628514815
281397684691
293108193486
306911996344
3115370966058

[1,1,3,6,15,31,73,157,358,785,1762,3896,8702,
 19299,42995,95507,212552,472445,1050973,2336670,
 5197036,11556157,25700188,57150018,127093805,
 282627186,628514815,1397684691,3108193486,
 6911996344,15370966058]