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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.

A144442 Triangle read by rows: T(n, k) = (5*n-5*k+1)*T(n-1, k-1) +(5*k-4)*T(n-1, k) + 5*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 17
6 1
7 1
8 118
9 118
10 1
11 1
12 729
13 2681
14 729
15 1
16 1
17 4400
18 41745
19 41745
20 4400
21 1
22 1
23 26431
24 555240
25 1349245
26 555240
27 26431
28 1
29 1
30 158622
31 6816846
32 33456685
33 33456685
34 6816846
35 158622
36 1
37 1
38 951773
39 80034743
40 715321156
41 1411926995
42 715321156
43 80034743
44 951773
45 1

List of values

[1, 1, 1, 1, 17, 1, 1, 118, 118, 1, 1, 729, 2681, 729, 1, 1, 4400, 41745, 41745, 4400, 1, 1, 26431, 555240, 1349245, 555240, 26431, 1, 1, 158622, 6816846, 33456685, 33456685, 6816846, 158622, 1, 1, 951773, 80034743, 715321156, 1411926995, 715321156, 80034743, 951773, 1]

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

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