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.

A218328 Odd 9-gonal (nonagonal) pyramidal numbers.

Table of values

n a(n)
1 1
2 155
3 885
4 2639
5 5865
6 11011
7 18525
8 28855
9 42449
10 59755
11 81221
12 107295
13 138425
14 175059
15 217645
16 266631
17 322465
18 385595
19 456469
20 535535
21 623241
22 720035
23 826365
24 942679
25 1069425
26 1207051
27 1356005
28 1516735
29 1689689
30 1875315
31 2074061
32 2286375
33 2512705
34 2753499

List of values

[1, 155, 885, 2639, 5865, 11011, 18525, 28855, 42449, 59755, 81221, 107295, 138425, 175059, 217645, 266631, 322465, 385595, 456469, 535535, 623241, 720035, 826365, 942679, 1069425, 1207051, 1356005, 1516735, 1689689, 1875315, 2074061, 2286375, 2512705, 2753499]