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A139847 as a simple table

n a(n)
1 19
2 31
3 139
4 199
5 271
6 439
7 619
8 691
9 811
10 859
11 1039
12 1231
13 1279
14 1291
15 1399
16 1459
17 1531
18 1699
19 1879
20 1951
21 2131
22 2239
23 2371
24 2539
25 2551
26 2659
27 2719
28 2791
29 2971
30 3079
31 3331
32 3391
33 3499
34 3559
35 3631
36 3919
37 4051
38 4219
39 4231
40 4339
41 4591
42 4639

[19,31,139,199,271,439,619,691,811,859,1039,1231,
 1279,1291,1399,1459,1531,1699,1879,1951,2131,2239,
 2371,2539,2551,2659,2719,2791,2971,3079,3331,3391,
 3499,3559,3631,3919,4051,4219,4231,4339,4591,4639]

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Last modified April 24 20:08 EDT 2024. Contains 371963 sequences. (Running on oeis4.)