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A155232 as a simple table

na(n)
21
34
410
522
640
7361
82821
919057
10110575
111423822
1226284909
13502358770
149341556682
15253322462407
1610114422061267
17485429682957349
1825616146962812161
191724462843271452173
20157410261704230494205

[1,4,10,22,40,361,2821,19057,110575,1423822,
 26284909,502358770,9341556682,253322462407,
 10114422061267,485429682957349,25616146962812161,
 1724462843271452173,157410261704230494205]