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A042143 as a simple table

na(n)
01
12
25
312
417
529
646
7305
8656
9961
109305
11112621
121022894
131135515
143293924
1520899059
1624192983
1745092042
1869285025
19183662092
20436609209
211056880510
2251166873689
23103390627888
24257948129465
25619286886818
26877235016283
271496521903101
282373756919384
2915739063419405

[1,2,5,12,17,29,46,305,656,961,9305,112621,
 1022894,1135515,3293924,20899059,24192983,
 45092042,69285025,183662092,436609209,1056880510,
 51166873689,103390627888,257948129465,
 619286886818,877235016283,1496521903101,
 2373756919384,15739063419405]