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A245747 as a simple table

na(n)
41
52
65
710
821
942
1087
11178
12371
13773
141630
153447
167346
1715712
1833790
1972922
20158020
21343494
22749101
231638102
243591723
257893801
2617387930
2738379199
2884875595
29188036829
30417284180
31927469844
322064465340
334601670624
3410270463564
3522950838754
3651346678940

[1,2,5,10,21,42,87,178,371,773,1630,3447,7346,
 15712,33790,72922,158020,343494,749101,1638102,
 3591723,7893801,17387930,38379199,84875595,
 188036829,417284180,927469844,2064465340,
 4601670624,10270463564,22950838754,51346678940]