A139900 - OEIS

A139900 as a simple table

n	a(n)
1	23
2	47
3	167
4	263
5	383
6	503
7	647
8	743
9	863
10	887
11	983
12	1103
13	1223
14	1367
15	1487
16	1583
17	1607
18	1823
19	1847
20	2063
21	2087
22	2207
23	2423
24	2447
25	2543
26	2663
27	2687
28	2903
29	2927
30	3023
31	3167
32	3407
33	3527
34	3623
35	3767
36	3863
37	4007
38	4127
39	4463
40	4583
41	4703
42	4943

[23,47,167,263,383,503,647,743,863,887,983,1103, 1223,1367,1487,1583,1607,1823,1847,2063,2087,2207, 2423,2447,2543,2663,2687,2903,2927,3023,3167,3407, 3527,3623,3767,3863,4007,4127,4463,4583,4703,4943]