login

A347837 as a simple table

na(n)
121
253
3117
4149
5181
6245
7277
8309
9373
10405
11437
12501
13533
14565
15629
16661
17693
18757
19789
20821
21885
22917
23949
241013
251045
261077
271141
281173
291205
301269
311301
321333
331397
341429
351461
361525
371557
381589
391653
401685

[21,53,117,149,181,245,277,309,373,405,437,501,
 533,565,629,661,693,757,789,821,885,917,949,1013,
 1045,1077,1141,1173,1205,1269,1301,1333,1397,1429,
 1461,1525,1557,1589,1653,1685]