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.

A187067 Let i be in {1,2,3} and let r >= 0 be an integer. Let p = {p_1, p_2, p_3} = {-2,0,1}, n = 2*r + p_i and define a(-2)=0. Then, a(n) = a(2*r + p_i) gives the quantity of H_(7,3,0) tiles in a subdivided H_(7,i,r) tile after linear scaling by the factor x^r, where x = sqrt(2*cos(Pi/7)).

Table of values

n a(n)
0 0
1 1
2 1
3 1
4 1
5 2
6 3
7 3
8 4
9 6
10 9
11 10
12 14
13 19
14 28
15 33
16 47
17 61
18 89
19 108
20 155
21 197
22 286
23 352
24 507
25 638
26 924
27 1145
28 1652
29 2069
30 2993
31 3721
32 5373
33 6714
34 9707
35 12087
36 17460
37 21794
38 31501
39 39254
40 56714
41 70755
42 102256

List of values

[0, 1, 1, 1, 1, 2, 3, 3, 4, 6, 9, 10, 14, 19, 28, 33, 47, 61, 89, 108, 155, 197, 286, 352, 507, 638, 924, 1145, 1652, 2069, 2993, 3721, 5373, 6714, 9707, 12087, 17460, 21794, 31501, 39254, 56714, 70755, 102256]