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A268747 as a simple table

na(n)
123
2244
32615
426334
5255651
62425799
722577073
8207252725
91880654551
1016909709308
11150867667407
121337324783132
1311788337576943
14103412756868981
15903363696442081
167862056896605875
1768198486775427551
18589834799847933624

[23,244,2615,26334,255651,2425799,22577073,
 207252725,1880654551,16909709308,150867667407,
 1337324783132,11788337576943,103412756868981,
 903363696442081,7862056896605875,
 68198486775427551,589834799847933624]