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.

A099561 Sum C(n-3k,k-1), k=0..floor(n/4).

Table of values

n a(n)
0 0
1 0
2 0
3 0
4 1
5 1
6 1
7 1
8 3
9 4
10 5
11 6
12 10
13 14
14 19
15 25
16 36
17 50
18 69
19 94
20 131
21 181
22 250
23 344
24 476
25 657
26 907
27 1251
28 1728
29 2385
30 3292
31 4543
32 6272
33 8657
34 11949
35 16492
36 22765
37 31422
38 43371
39 59863
40 82629
41 114051
42 157422
43 217285
44 299915
45 413966
46 571388
47 788673

List of values

[0, 0, 0, 0, 1, 1, 1, 1, 3, 4, 5, 6, 10, 14, 19, 25, 36, 50, 69, 94, 131, 181, 250, 344, 476, 657, 907, 1251, 1728, 2385, 3292, 4543, 6272, 8657, 11949, 16492, 22765, 31422, 43371, 59863, 82629, 114051, 157422, 217285, 299915, 413966, 571388, 788673]

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

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