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A031451 as a simple table

na(n)
115
247
355
459
561
662
7159
8175
9183
10187
11189
12190
13207
14215
15219
16221
17222
18231
19235
20237
21238
22243
23245
24246
25249
26250
27252
28575
29607
30623
31631
32635
33637
34638
35671
36687
37695
38699
39701
40702
41719
42727
43731
44733
45734
46743
47747

[15,47,55,59,61,62,159,175,183,187,189,190,207,
 215,219,221,222,231,235,237,238,243,245,246,249,
 250,252,575,607,623,631,635,637,638,671,687,695,
 699,701,702,719,727,731,733,734,743,747]