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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.

A113439 a(n) = a(n-1) + Sum_{k=1..floor(n/4)} a(n-4k), with a(0)=1.

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 2
5 3
6 4
7 5
8 8
9 12
10 17
11 23
12 34
13 50
14 72
15 101
16 146
17 212
18 306
19 436
20 627
21 905
22 1305
23 1871
24 2689
25 3872
26 5577
27 8014
28 11521
29 16576
30 23858
31 34309
32 49337
33 70968
34 102108
35 146868
36 211233
37 303832
38 437080
39 628708
40 904306
41 1300737
42 1871065
43 2691401

List of values

[1, 1, 1, 1, 2, 3, 4, 5, 8, 12, 17, 23, 34, 50, 72, 101, 146, 212, 306, 436, 627, 905, 1305, 1871, 2689, 3872, 5577, 8014, 11521, 16576, 23858, 34309, 49337, 70968, 102108, 146868, 211233, 303832, 437080, 628708, 904306, 1300737, 1871065, 2691401]

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

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