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.

A005891 Centered pentagonal numbers: (5n^2+5n+2)/2; crystal ball sequence for 3.3.3.4.4. planar net.

Table of values

n a(n)
0 1
1 6
2 16
3 31
4 51
5 76
6 106
7 141
8 181
9 226
10 276
11 331
12 391
13 456
14 526
15 601
16 681
17 766
18 856
19 951
20 1051
21 1156
22 1266
23 1381
24 1501
25 1626
26 1756
27 1891
28 2031
29 2176
30 2326
31 2481
32 2641
33 2806
34 2976
35 3151
36 3331
37 3516
38 3706
39 3901
40 4101
41 4306
42 4516
43 4731
44 4951
45 5176
46 5406

List of values

[1, 6, 16, 31, 51, 76, 106, 141, 181, 226, 276, 331, 391, 456, 526, 601, 681, 766, 856, 951, 1051, 1156, 1266, 1381, 1501, 1626, 1756, 1891, 2031, 2176, 2326, 2481, 2641, 2806, 2976, 3151, 3331, 3516, 3706, 3901, 4101, 4306, 4516, 4731, 4951, 5176, 5406]

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

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