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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.

A352041 a(0) = 1; a(n) = Sum_{k=0..floor(n/4)} binomial(n-3*k,k) * a(k).

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 2
5 3
6 4
7 5
8 7
9 10
10 14
11 19
12 26
13 36
14 50
15 69
16 96
17 136
18 196
19 285
20 417
21 614
22 909
23 1349
24 2002
25 2968
26 4394
27 6493
28 9572
29 14074
30 20639
31 30189
32 44049
33 64123
34 93151
35 135080
36 195599
37 282915
38 408884
39 590658
40 853080
41 1232168
42 1780190
43 2573059
44 3721103

List of values

[1, 1, 1, 1, 2, 3, 4, 5, 7, 10, 14, 19, 26, 36, 50, 69, 96, 136, 196, 285, 417, 614, 909, 1349, 2002, 2968, 4394, 6493, 9572, 14074, 20639, 30189, 44049, 64123, 93151, 135080, 195599, 282915, 408884, 590658, 853080, 1232168, 1780190, 2573059, 3721103]

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

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