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.

A049453 Second pentagonal numbers with even index: a(n) = n*(6*n+1).

Table of values

n a(n)
0 0
1 7
2 26
3 57
4 100
5 155
6 222
7 301
8 392
9 495
10 610
11 737
12 876
13 1027
14 1190
15 1365
16 1552
17 1751
18 1962
19 2185
20 2420
21 2667
22 2926
23 3197
24 3480
25 3775
26 4082
27 4401
28 4732
29 5075
30 5430
31 5797
32 6176
33 6567
34 6970
35 7385
36 7812
37 8251
38 8702
39 9165
40 9640
41 10127
42 10626
43 11137
44 11660
45 12195

List of values

[0, 7, 26, 57, 100, 155, 222, 301, 392, 495, 610, 737, 876, 1027, 1190, 1365, 1552, 1751, 1962, 2185, 2420, 2667, 2926, 3197, 3480, 3775, 4082, 4401, 4732, 5075, 5430, 5797, 6176, 6567, 6970, 7385, 7812, 8251, 8702, 9165, 9640, 10127, 10626, 11137, 11660, 12195]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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