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.

A226379 a(5n) = 2*n*(2*n+1), a(5n+1) = (2*n-3)*(2*n+5), a(5n+2) = (2*n-1)*(2*n+3), a(5n+3) = (2*n+2)*(2*n+1), a(5n+4) = (2*n+1)*(2*n+3).

Table of values

n a(n)
0 0
1 -15
2 -3
3 2
4 3
5 6
6 -7
7 5
8 12
9 15
10 20
11 9
12 21
13 30
14 35
15 42
16 33
17 45
18 56
19 63
20 72
21 65
22 77
23 90
24 99
25 110
26 105
27 117
28 132
29 143
30 156
31 153
32 165
33 182
34 195
35 210
36 209
37 221
38 240
39 255
40 272
41 273
42 285
43 306
44 323
45 342
46 345
47 357
48 380
49 399
50 420
51 425
52 437

List of values

[0, -15, -3, 2, 3, 6, -7, 5, 12, 15, 20, 9, 21, 30, 35, 42, 33, 45, 56, 63, 72, 65, 77, 90, 99, 110, 105, 117, 132, 143, 156, 153, 165, 182, 195, 210, 209, 221, 240, 255, 272, 273, 285, 306, 323, 342, 345, 357, 380, 399, 420, 425, 437]

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

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