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A291247 as a simple table

na(n)
01
12
25
310
424
549
6112
7238
8526
91142
102491
115442
1211842
1325873
1456344
15122975
16268042
17584633
181274820
192779895
206062306
2113219186
2228827703
2362861754
24137082358
25298927682
26651861824
271421488867
283099781932
296759580078
3014740333285
3132143687954

[1,2,5,10,24,49,112,238,526,1142,2491,5442,11842,
 25873,56344,122975,268042,584633,1274820,2779895,
 6062306,13219186,28827703,62861754,137082358,
 298927682,651861824,1421488867,3099781932,
 6759580078,14740333285,32143687954]