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A258473 as a simple table

na(n)
31
45
516
641
791
8186
9351
10635
111090
121824
132939
144652
157162
1610875
1716159
1823758
1934321
2049145
2169389
2297213
23134608
24185172
25252182
26341443
27458413
28612186
29811567
301070826
311403784
321832370
332378320
343074642
353954869
365068684
376466697
388222640
3910412903

[1,5,16,41,91,186,351,635,1090,1824,2939,4652,
 7162,10875,16159,23758,34321,49145,69389,97213,
 134608,185172,252182,341443,458413,612186,811567,
 1070826,1403784,1832370,2378320,3074642,3954869,
 5068684,6466697,8222640,10412903]