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A007641 as a simple table

na(n)
129
231
337
447
561
679
7101
8127
9157
10191
11229
12271
13317
14367
15421
16479
17541
18607
19677
20751
21829
22911
23997
241087
251181
261279
271381
281487
291597
301951
312207
322341
332621
342767
352917
363229
373391
383557
393727
404079
414261
424447
434637
444831
455231
465437

[29,31,37,47,61,79,101,127,157,191,229,271,317,
 367,421,479,541,607,677,751,829,911,997,1087,1181,
 1279,1381,1487,1597,1951,2207,2341,2621,2767,2917,
 3229,3391,3557,3727,4079,4261,4447,4637,4831,5231,
 5437]