login

A075440 as a simple table

na(n)
13
21
31
47
59
62
75
81
913
1015
1117
1219
1321
144
153
161
1725
1827
195
201
212
2213
2333
2435
2519
2618
2739
2841
2943
307
3117
3247
3349
3451
3553
3655
3757
3859
3961
4039
413
4265
4367
4469
4571
4635
4738
4875
4977
5079
5181
5247
531
5485
5587
5689
5723
5817
5971
6010
6112
6295
6397
6499
65101
66103
675
6865
69107
70109
714
7211
73113
74115

[3,1,1,7,9,2,5,1,13,15,17,19,21,4,3,1,25,27,5,1,2,
 13,33,35,19,18,39,41,43,7,17,47,49,51,53,55,57,59,
 61,39,3,65,67,69,71,35,38,75,77,79,81,47,1,85,87,
 89,23,17,71,10,12,95,97,99,101,103,5,65,107,109,4,
 11,113,115]