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.

A364602 Triangle T(n,k) with rows of length 2*n-1, generated by T(1,1)=0, T(n,1)=T(n-1,1)+2, T(n,2)=4*(n-1)-1, and for k>=3, T(n,k)=4*T(n-1,k-2)+1.

Table of values

n a(n)
1 0
2 2
3 3
4 1
5 4
6 7
7 9
8 13
9 5
10 6
11 11
12 17
13 29
14 37
15 53
16 21
17 8
18 15
19 25
20 45
21 69
22 117
23 149
24 213
25 85
26 10
27 19
28 33
29 61
30 101
31 181
32 277
33 469
34 597
35 853
36 341
37 12
38 23
39 41
40 77
41 133
42 245
43 405
44 725
45 1109
46 1877
47 2389
48 3413
49 1365
50 14
51 27
52 49
53 93
54 165
55 309
56 533
57 981
58 1621
59 2901

List of values

[0, 2, 3, 1, 4, 7, 9, 13, 5, 6, 11, 17, 29, 37, 53, 21, 8, 15, 25, 45, 69, 117, 149, 213, 85, 10, 19, 33, 61, 101, 181, 277, 469, 597, 853, 341, 12, 23, 41, 77, 133, 245, 405, 725, 1109, 1877, 2389, 3413, 1365, 14, 27, 49, 93, 165, 309, 533, 981, 1621, 2901]