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A187781 as a simple table

na(n)
31
41
53
63
77
87
914
1014
1125
1221
1341
1440
1563
1660
1792
1872
19129
20121
21175
22166
23231
24192
25298
26285
27377
28360
29469
30350
31575
32553
33696
34666
35833
36744
37987
38956
391159
401123
411350
421165
431561
441508
451793
461741
472047
481875
492324
502255
512625
522563
532951
542761
553303
563214
573682
583588
594089
603695

[1,1,3,3,7,7,14,14,25,21,41,40,63,60,92,72,129,
 121,175,166,231,192,298,285,377,360,469,350,575,
 553,696,666,833,744,987,956,1159,1123,1350,1165,
 1561,1508,1793,1741,2047,1875,2324,2255,2625,2563,
 2951,2761,3303,3214,3682,3588,4089,3695]