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A044006 as a simple table

n a(n)
1 13
2 31
3 113
4 139
5 213
6 231
7 319
8 331
9 413
10 431
11 513
12 531
13 613
14 631
15 713
16 731
17 813
18 831
19 913
20 931
21 1013
22 1031
23 1113
24 1139
25 1213
26 1231
27 1399
28 1413
29 1431
30 1513
31 1531
32 1613
33 1631
34 1713
35 1731
36 1813
37 1831
38 1913
39 1931
40 2013
41 2031

[13,31,113,139,213,231,319,331,413,431,513,531,
 613,631,713,731,813,831,913,931,1013,1031,1113,
 1139,1213,1231,1399,1413,1431,1513,1531,1613,1631,
 1713,1731,1813,1831,1913,1931,2013,2031]

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Last modified September 21 23:55 EDT 2019. Contains 327286 sequences. (Running on oeis4.)