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.

A025121 a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n-k+1), where k = [ n/2 ], s = A000201 (lower Wythoff sequence), t = A014306.

Table of values

n a(n)
1 1
2 1
3 3
4 1
5 4
6 8
7 14
8 14
9 21
10 19
11 27
12 25
13 34
14 33
15 43
16 42
17 54
18 68
19 83
20 81
21 97
22 95
23 112
24 111
25 130
26 129
27 149
28 147
29 170
30 168
31 191
32 190
33 215
34 213
35 238
36 235
37 262
38 290
39 321
40 319
41 351
42 349
43 382
44 381
45 416
46 414
47 451
48 449
49 488
50 486
51 526
52 525
53 566
54 565
55 607
56 603
57 647
58 643
59 687
60 685
61 731

List of values

[1, 1, 3, 1, 4, 8, 14, 14, 21, 19, 27, 25, 34, 33, 43, 42, 54, 68, 83, 81, 97, 95, 112, 111, 130, 129, 149, 147, 170, 168, 191, 190, 215, 213, 238, 235, 262, 290, 321, 319, 351, 349, 382, 381, 416, 414, 451, 449, 488, 486, 526, 525, 566, 565, 607, 603, 647, 643, 687, 685, 731]