cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A218172 Centered 12-gonal numbers which are semiprimes, intersection of A003154 and A001358.

Table of values

n a(n)
1 121
2 253
3 793
4 1261
5 1441
6 1633
7 1837
8 2773
9 3601
10 3901
11 4213
12 4537
13 4873
14 5221
15 7141
16 9841
17 11881
18 14113
19 14701
20 16537
21 17173
22 17821
23 19153
24 19837
25 21241
26 22693
27 23437
28 24193
29 24961
30 28153
31 28981
32 29821
33 30673
34 34201
35 37921
36 38881
37 39853
38 40837
39 41833
40 43861
41 45937
42 48061
43 49141
44 50233
45 53581
46 55873

List of values

[121, 253, 793, 1261, 1441, 1633, 1837, 2773, 3601, 3901, 4213, 4537, 4873, 5221, 7141, 9841, 11881, 14113, 14701, 16537, 17173, 17821, 19153, 19837, 21241, 22693, 23437, 24193, 24961, 28153, 28981, 29821, 30673, 34201, 37921, 38881, 39853, 40837, 41833, 43861, 45937, 48061, 49141, 50233, 53581, 55873]