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.

A217571 a(n) = (2*n*(n+5) + (2*n+1)*(-1)^n - 1)/8.

Table of values

n a(n)
1 1
2 4
3 5
4 10
5 11
6 18
7 19
8 28
9 29
10 40
11 41
12 54
13 55
14 70
15 71
16 88
17 89
18 108
19 109
20 130
21 131
22 154
23 155
24 180
25 181
26 208
27 209
28 238
29 239
30 270
31 271
32 304
33 305
34 340
35 341
36 378
37 379
38 418
39 419
40 460
41 461
42 504
43 505
44 550
45 551
46 598
47 599
48 648
49 649
50 700
51 701
52 754
53 755
54 810
55 811
56 868

List of values

[1, 4, 5, 10, 11, 18, 19, 28, 29, 40, 41, 54, 55, 70, 71, 88, 89, 108, 109, 130, 131, 154, 155, 180, 181, 208, 209, 238, 239, 270, 271, 304, 305, 340, 341, 378, 379, 418, 419, 460, 461, 504, 505, 550, 551, 598, 599, 648, 649, 700, 701, 754, 755, 810, 811, 868]

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

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