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.

A187498 Let i be in {1,2,3,4} and let r >= 0 be an integer. Let p={p_1, p_2, p_3, p_4} = {-3,0,1,2}, n=3*r+p_i, and define a(-3)=0. Then a(n)=a(3*r+p_i) gives the quantity of H_(9,4,0) tiles in a subdivided H_(9,i,r) tile after linear scaling by the factor Q^r, where Q=sqrt(2*cos(Pi/9)).

Table of values

n a(n)
0 0
1 0
2 1
3 0
4 1
5 1
6 1
7 1
8 2
9 1
10 3
11 3
12 4
13 4
14 6
15 5
16 10
17 10
18 14
19 15
20 20
21 20
22 34
23 35
24 48
25 55
26 69
27 75
28 117
29 124
30 165
31 199
32 241
33 274
34 406
35 440
36 571
37 714
38 846
39 988
40 1417
41 1560
42 1988
43 2548
44 2977
45 3536
46 4965
47 5525
48 6953
49 9061
50 10490
51 12597
52 17443
53 19551

List of values

[0, 0, 1, 0, 1, 1, 1, 1, 2, 1, 3, 3, 4, 4, 6, 5, 10, 10, 14, 15, 20, 20, 34, 35, 48, 55, 69, 75, 117, 124, 165, 199, 241, 274, 406, 440, 571, 714, 846, 988, 1417, 1560, 1988, 2548, 2977, 3536, 4965, 5525, 6953, 9061, 10490, 12597, 17443, 19551]