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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.

A211013 Second 13-gonal numbers: a(n) = n*(11*n+9)/2.

Table of values

n a(n)
0 0
1 10
2 31
3 63
4 106
5 160
6 225
7 301
8 388
9 486
10 595
11 715
12 846
13 988
14 1141
15 1305
16 1480
17 1666
18 1863
19 2071
20 2290
21 2520
22 2761
23 3013
24 3276
25 3550
26 3835
27 4131
28 4438
29 4756
30 5085
31 5425
32 5776
33 6138
34 6511
35 6895
36 7290
37 7696
38 8113
39 8541
40 8980
41 9430
42 9891
43 10363

List of values

[0, 10, 31, 63, 106, 160, 225, 301, 388, 486, 595, 715, 846, 988, 1141, 1305, 1480, 1666, 1863, 2071, 2290, 2520, 2761, 3013, 3276, 3550, 3835, 4131, 4438, 4756, 5085, 5425, 5776, 6138, 6511, 6895, 7290, 7696, 8113, 8541, 8980, 9430, 9891, 10363]

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

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