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A360986 as a simple table

n a(n)
1 2
2 3
3 5
4 7
5 199
6 919
7 991
8 2999
9 9929
10 11177
11 11717
12 17117
13 31333
14 33331
15 71171
16 71711
17 161611
18 616111
19 999499
20 1111333
21 1131133
22 1131331
23 1133131
24 1313311
25 3111313
26 3111331
27 3131113
28 3131311
29 3133111
30 3311131
31 3337777
32 3377377
33 3773377
34 3773773
35 7377373
36 7733377
37 7737337
38 7737733
39 32333333

[2,3,5,7,199,919,991,2999,9929,11177,11717,17117,
 31333,33331,71171,71711,161611,616111,999499,
 1111333,1131133,1131331,1133131,1313311,3111313,
 3111331,3131113,3131311,3133111,3311131,3337777,
 3377377,3773377,3773773,7377373,7733377,7737337,
 7737733,32333333]

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Last modified August 11 23:41 EDT 2024. Contains 375082 sequences. (Running on oeis4.)