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A340444 as a simple table

na(n)
10
20
331
441
561
671
7151
8101
9199
10151
11227
12191
13211
14311
15241
16271
17487
18311
19479
20653
21521
22401
23421
24727
25491
26823
27521
28541
29773
30571
31641
32661
33691
34701
35751
36761
371109
38821
392039
401399
411447
42911
431543
44971
45991
461607
471061
481571
491831
501151
511171
521201
531697
542273
551291
561321
572711

[0,0,31,41,61,71,151,101,199,151,227,191,211,311,
 241,271,487,311,479,653,521,401,421,727,491,823,
 521,541,773,571,641,661,691,701,751,761,1109,821,
 2039,1399,1447,911,1543,971,991,1607,1061,1571,
 1831,1151,1171,1201,1697,2273,1291,1321,2711]