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.

A003522 a(n) = Sum_{k=0..n} C(n-k,3k).

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 2
5 5
6 11
7 21
8 37
9 64
10 113
11 205
12 377
13 693
14 1266
15 2301
16 4175
17 7581
18 13785
19 25088
20 45665
21 83097
22 151169
23 274969
24 500162
25 909845
26 1655187
27 3011157
28 5477917
29 9965312
30 18128529
31 32978725
32 59993817
33 109139117
34 198543154

List of values

[1, 1, 1, 1, 2, 5, 11, 21, 37, 64, 113, 205, 377, 693, 1266, 2301, 4175, 7581, 13785, 25088, 45665, 83097, 151169, 274969, 500162, 909845, 1655187, 3011157, 5477917, 9965312, 18128529, 32978725, 59993817, 109139117, 198543154]