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A026748 as a simple table

na(n)
01
13
211
344
4184
5790
63452
715278
868290
9307696
101395696
116367199
1229193025
13134442102
14621609060
152884432810
1613428450520
1762703991531
18293606387095
191378309455352
206485734373020
2130586630485443
22144544075759391
23684395988590939

[1,3,11,44,184,790,3452,15278,68290,307696,
 1395696,6367199,29193025,134442102,621609060,
 2884432810,13428450520,62703991531,293606387095,
 1378309455352,6485734373020,30586630485443,
 144544075759391,684395988590939]