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A248981 as a simple table

na(n)
12
24
33
411
55
617
77
839
929
1013
1157
1241
1319
1475
1523
16119
1763
1831
19145
2037
21121
2285
2343
24139
2547
26203
2753
28221
2959
30299
3167
32195
3371
34343
3579
36223
3783
38311
3989
40409
4197
42265
43101
44189
45103
46287
47107
48395
49113
50813
51127
52335
53131
54455
55137
56249
57709
58149
59267
60151
61517
62157
63535
64163
65423
66167
67569
68173
69587
70179
71321
72181
73911
74191

[2,4,3,11,5,17,7,39,29,13,57,41,19,75,23,119,63,
 31,145,37,121,85,43,139,47,203,53,221,59,299,67,
 195,71,343,79,223,83,311,89,409,97,265,101,189,
 103,287,107,395,113,813,127,335,131,455,137,249,
 709,149,267,151,517,157,535,163,423,167,569,173,
 587,179,321,181,911,191]