A142654 - OEIS

A142654 as a simple table

n	a(n)
1	31
2	199
3	311
4	367
5	479
6	647
7	983
8	1039
9	1151
10	1319
11	1487
12	1543
13	1823
14	1879
15	2383
16	2551
17	2663
18	2719
19	2887
20	2999
21	3167
22	3391
23	3559
24	3671
25	3727
26	4007
27	4231
28	4567
29	4679
30	4903
31	5351
32	5407
33	5519
34	5743
35	6079
36	6247
37	6359
38	6863
39	7591
40	7703
41	7759
42	7927
43	8039
44	8263

[31,199,311,367,479,647,983,1039,1151,1319,1487, 1543,1823,1879,2383,2551,2663,2719,2887,2999,3167, 3391,3559,3671,3727,4007,4231,4567,4679,4903,5351, 5407,5519,5743,6079,6247,6359,6863,7591,7703,7759, 7927,8039,8263]