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.

A371100 Array A read by upward antidiagonals in which the entry A(n,k) in row n and column k is defined by A(n, k) = 4^n*(6*k - 3 - 2*(-1)^n) + (4^n - 1)/3, n,k >= 1.

Table of values

n a(n)
1 21
2 21
3 45
4 341
5 117
6 69
7 341
8 725
9 213
10 93
11 5461
12 1877
13 1109
14 309
15 117
16 5461
17 11605
18 3413
19 1493
20 405
21 141
22 87381
23 30037
24 17749
25 4949
26 1877
27 501
28 165
29 87381
30 185685
31 54613
32 23893
33 6485
34 2261
35 597
36 189
37 1398101
38 480597
39 283989
40 79189
41 30037
42 8021
43 2645
44 693
45 213
46 1398101
47 2970965
48 873813
49 382293
50 103765
51 36181
52 9557
53 3029
54 789
55 237

List of values

[21, 21, 45, 341, 117, 69, 341, 725, 213, 93, 5461, 1877, 1109, 309, 117, 5461, 11605, 3413, 1493, 405, 141, 87381, 30037, 17749, 4949, 1877, 501, 165, 87381, 185685, 54613, 23893, 6485, 2261, 597, 189, 1398101, 480597, 283989, 79189, 30037, 8021, 2645, 693, 213, 1398101, 2970965, 873813, 382293, 103765, 36181, 9557, 3029, 789, 237]