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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.

A348289 a(n) = Sum_{k=0..floor(n/8)} binomial(n-4*k,4*k).

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 1
5 1
6 1
7 1
8 2
9 6
10 16
11 36
12 71
13 127
14 211
15 331
16 497
17 725
18 1047
19 1531
20 2316
21 3668
22 6064
23 10312
24 17717
25 30309
26 51165
27 84893
28 138417
29 222329
30 353285
31 558253
32 881918
33 1399274
34 2236480
35 3604588
36 5853067
37 9553715
38 15631615
39 25570103
40 41734433
41 67889133
42 110035211
43 177778263

List of values

[1, 1, 1, 1, 1, 1, 1, 1, 2, 6, 16, 36, 71, 127, 211, 331, 497, 725, 1047, 1531, 2316, 3668, 6064, 10312, 17717, 30309, 51165, 84893, 138417, 222329, 353285, 558253, 881918, 1399274, 2236480, 3604588, 5853067, 9553715, 15631615, 25570103, 41734433, 67889133, 110035211, 177778263]

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

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