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.

A157277 Triangle T(n, k, m) = (m*(n-k) + 1)*T(n-1, k-1, m) + (m*k + 1)*T(n-1, k, m) + m*f(n,k)*T(n-2, k-1, m) with T(n, 0, m) = T(n, n, m) = 1, f(n, k) = 2*k if k <= floor(n/2) otherwise 2*(n-k), and m = 2, read by rows.

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 10
5 1
6 1
7 39
8 39
9 1
10 1
11 128
12 470
13 128
14 1
15 1
16 397
17 3558
18 3558
19 397
20 1
21 1
22 1206
23 22387
24 55452
25 22387
26 1206
27 1
28 1
29 3635
30 128377
31 632343
32 632343
33 128377
34 3635
35 1
36 1
37 10924
38 698788
39 6107192
40 12269406
41 6107192
42 698788
43 10924
44 1
45 1
46 32793
47 3686880
48 53375112
49 187721254
50 187721254
51 53375112
52 3686880
53 32793
54 1

List of values

[1, 1, 1, 1, 10, 1, 1, 39, 39, 1, 1, 128, 470, 128, 1, 1, 397, 3558, 3558, 397, 1, 1, 1206, 22387, 55452, 22387, 1206, 1, 1, 3635, 128377, 632343, 632343, 128377, 3635, 1, 1, 10924, 698788, 6107192, 12269406, 6107192, 698788, 10924, 1, 1, 32793, 3686880, 53375112, 187721254, 187721254, 53375112, 3686880, 32793, 1]