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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.

A144443 Triangle read by rows: T(n, k) = (6*n-6*k+1)*T(n-1, k-1) + (6*k-5)*T(n-1, k) + 6*T(n-2, k-1) with T(n, 1) = T(n, n) = 1.

Table of values

n a(n)
1 1
2 1
3 1
4 1
5 20
6 1
7 1
8 159
9 159
10 1
11 1
12 1138
13 4254
14 1138
15 1
16 1
17 7997
18 77878
19 77878
20 7997
21 1
22 1
23 56016
24 1219167
25 2984888
26 1219167
27 56016
28 1
29 1
30 392155
31 17633649
32 87659315
33 87659315
34 17633649
35 392155
36 1
37 1
38 2745134
39 244083268
40 2219485106
41 4400875078
42 2219485106
43 244083268
44 2745134
45 1

List of values

[1, 1, 1, 1, 20, 1, 1, 159, 159, 1, 1, 1138, 4254, 1138, 1, 1, 7997, 77878, 77878, 7997, 1, 1, 56016, 1219167, 2984888, 1219167, 56016, 1, 1, 392155, 17633649, 87659315, 87659315, 17633649, 392155, 1, 1, 2745134, 244083268, 2219485106, 4400875078, 2219485106, 244083268, 2745134, 1]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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