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.

A386380 a(0) = 1; a(n) = Sum_{k=0..floor((n-1)/6)} a(6*k) * a(n-1-6*k).

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 1
5 1
6 1
7 2
8 3
9 4
10 5
11 6
12 7
13 15
14 24
15 34
16 45
17 57
18 70
19 154
20 253
21 368
22 500
23 650
24 819
25 1827
26 3045
27 4495
28 6200
29 8184
30 10472
31 23562
32 39627
33 59052
34 82251
35 109668
36 141778
37 320866
38 543004
39 814506
40 1142295
41 1533939
42 1997688
43 4540200
44 7718340
45 11633440
46 16398200
47 22137570

List of values

[1, 1, 1, 1, 1, 1, 1, 2, 3, 4, 5, 6, 7, 15, 24, 34, 45, 57, 70, 154, 253, 368, 500, 650, 819, 1827, 3045, 4495, 6200, 8184, 10472, 23562, 39627, 59052, 82251, 109668, 141778, 320866, 543004, 814506, 1142295, 1533939, 1997688, 4540200, 7718340, 11633440, 16398200, 22137570]