A139901 - OEIS

A139901 as a simple table

n	a(n)
1	31
2	79
3	151
4	199
5	271
6	439
7	631
8	751
9	919
10	991
11	1039
12	1231
13	1279
14	1399
15	1471
16	1759
17	1831
18	1879
19	1951
20	1999
21	2239
22	2311
23	2551
24	2671
25	2719
26	2791
27	3079
28	3271
29	3319
30	3391
31	3511
32	3559
33	3631
34	3919
35	4111
36	4159
37	4231
38	4519
39	4591
40	4639
41	4759
42	4831

[31,79,151,199,271,439,631,751,919,991,1039,1231, 1279,1399,1471,1759,1831,1879,1951,1999,2239,2311, 2551,2671,2719,2791,3079,3271,3319,3391,3511,3559, 3631,3919,4111,4159,4231,4519,4591,4639,4759,4831]