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A048968 as a simple table

na(n)
13
25
36
413
520
637
745
849
961
1073
11150
12157
13169
14193
15277
16313
17361
18397
19421
20457
21541
22613
23661
24673
25733
26757
27832
28877
29961
30997
311093
321153
331201
341213
351237
361321
371381
381445
391453
401621
411657
421734
431753
441849
451873
461933
471993
482017
492137
502341

[3,5,6,13,20,37,45,49,61,73,150,157,169,193,277,
 313,361,397,421,457,541,613,661,673,733,757,832,
 877,961,997,1093,1153,1201,1213,1237,1321,1381,
 1445,1453,1621,1657,1734,1753,1849,1873,1933,1993,
 2017,2137,2341]