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.

A209048 Indices of the pentagonal numbers listed in A209049.

Table of values

n a(n)
0 1
1 2
2 4
3 3
4 12
5 11
6 32
7 27
8 75
9 192
10 427
11 171
12 1323
13 2187
14 6912
15 8192
16 4779
17 10923
18 49152
19 109227
20 60075
21 170667
22 786432
23 699051
24 1092267
25 4893355
26 5810859
27 11184811
28 25864875
29 95070891
30 101362347
31 44739243

List of values

[1, 2, 4, 3, 12, 11, 32, 27, 75, 192, 427, 171, 1323, 2187, 6912, 8192, 4779, 10923, 49152, 109227, 60075, 170667, 786432, 699051, 1092267, 4893355, 5810859, 11184811, 25864875, 95070891, 101362347, 44739243]