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.

A386396 a(0) = 1; a(n) = Sum_{k=0..floor((n-1)/7)} a(7*k) * a(n-1-7*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 3
10 4
11 5
12 6
13 7
14 8
15 17
16 27
17 38
18 50
19 63
20 77
21 92
22 200
23 325
24 468
25 630
26 812
27 1015
28 1240
29 2728
30 4488
31 6545
32 8925
33 11655
34 14763
35 18278
36 40508
37 67158
38 98728
39 135751
40 178794
41 228459
42 285384
43 635628
44 1059380
45 1566040
46 2165800
47 2869685
48 3689595
49 4638348

List of values

[1, 1, 1, 1, 1, 1, 1, 1, 2, 3, 4, 5, 6, 7, 8, 17, 27, 38, 50, 63, 77, 92, 200, 325, 468, 630, 812, 1015, 1240, 2728, 4488, 6545, 8925, 11655, 14763, 18278, 40508, 67158, 98728, 135751, 178794, 228459, 285384, 635628, 1059380, 1566040, 2165800, 2869685, 3689595, 4638348]