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A056912 as a simple table

na(n)
13
25
37
411
513
617
719
823
929
1031
1137
1241
1343
1447
1553
1659
1761
1867
1971
2073
2179
2283
2389
2497
25101
26103
27105
28107
29109
30113
31127
32131
33137
34139
35149
36151
37157
38163
39165
40167
41173
42179
43181
44191
45193
46195
47197
48199
49211
50223
51227
52229
53231
54233
55239
56241
57251
58255

[3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,
 67,71,73,79,83,89,97,101,103,105,107,109,113,127,
 131,137,139,149,151,157,163,165,167,173,179,181,
 191,193,195,197,199,211,223,227,229,231,233,239,
 241,251,255]