A289839 - OEIS

A289839 as a simple table

n	a(n)
1	31
2	47
3	79
4	127
5	191
6	271
7	367
8	479
9	607
10	751
11	911
12	1087
13	1279
14	1487
15	1951
16	2207
17	2767
18	3391
19	3727
20	4079
21	4447
22	4831
23	5231
24	5647
25	6079
26	6991
27	9007
28	9551
29	10111
30	10687
31	11279
32	11887
33	12511
34	13151
35	13807
36	14479
37	17327
38	20431
39	21247
40	22079
41	24671
42	26479
43	27407

[31,47,79,127,191,271,367,479,607,751,911,1087, 1279,1487,1951,2207,2767,3391,3727,4079,4447,4831, 5231,5647,6079,6991,9007,9551,10111,10687,11279, 11887,12511,13151,13807,14479,17327,20431,21247, 22079,24671,26479,27407]