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.

A211016 Triangle read by rows: T(n,k) = number of squares and rectangles of area 2^(k-1) after 2^n stages in the toothpick structure of A139250, n>=1, k>=1, assuming the toothpicks have length 2.

Table of values

n a(n)
1 0
2 0
3 4
4 8
5 12
6 4
7 40
8 52
9 12
10 4
11 168
12 212
13 52
14 12
15 4
16 680
17 852
18 212
19 52
20 12
21 4
22 2728
23 3412
24 852
25 212
26 52
27 12
28 4
29 10920
30 13652
31 3412
32 852
33 212
34 52
35 12
36 4
37 43688
38 54612
39 13652
40 3412
41 852
42 212
43 52
44 12
45 4
46 174760
47 218452
48 54612
49 13652
50 3412
51 852
52 212
53 52
54 12
55 4

List of values

[0, 0, 4, 8, 12, 4, 40, 52, 12, 4, 168, 212, 52, 12, 4, 680, 852, 212, 52, 12, 4, 2728, 3412, 852, 212, 52, 12, 4, 10920, 13652, 3412, 852, 212, 52, 12, 4, 43688, 54612, 13652, 3412, 852, 212, 52, 12, 4, 174760, 218452, 54612, 13652, 3412, 852, 212, 52, 12, 4]