login

A139642 as a simple table

na(n)
11
22
31
42
53
61
73
87
91
105
119
1213
131
145
159
161
177
181
197
209
2111
2215
2323
2425
251
269
2717
2825
291
3013
3125
321
339
3411
3519
361
3713
3825
3937
401
419
4213
4317
4425
4529
4649
471
4819
4931
5049
511
529
5317
5425
5533
5641
5749
5857
591
6019
6125
6243
6349
6467
651
6625
6737
681
699
7015
7123
7225
7331
7447
7549
7671
7781
781
7925
8049
8173
821
839

[1,2,1,2,3,1,3,7,1,5,9,13,1,5,9,1,7,1,7,9,11,15,
 23,25,1,9,17,25,1,13,25,1,9,11,19,1,13,25,37,1,9,
 13,17,25,29,49,1,19,31,49,1,9,17,25,33,41,49,57,1,
 19,25,43,49,67,1,25,37,1,9,15,23,25,31,47,49,71,
 81,1,25,49,73,1,9]