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A274698 as a simple table

na(n)
1-2
2-3
3-5
4-7
59
67
73
81
917
1011
1129
1223
1339
1437
1533
1647
1741
1859
1953
2069
2167
2261
2377
2471
2583
2699
2797
2893
2991
30107
31113
32129
33123
34121
35131
36149
37143
38157
39153
40167
41161
42179
43189
44187
45183
46181
47209
48217
49213
50211
51227
52221
53239
54249
55243

[-2,-3,-5,-7,9,7,3,1,17,11,29,23,39,37,33,47,41,
 59,53,69,67,61,77,71,83,99,97,93,91,107,113,129,
 123,121,131,149,143,157,153,167,161,179,189,187,
 183,181,209,217,213,211,227,221,239,249,243]