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.

A157523 Triangle T(n, k, q) = (q*(n-k) +1)*T(n-1, k-1, q) + (q*k+1)*T(n-1, k, q) + q*A157522(n, k)*T(n-2, k-1, q), with T(n, 0, q) = T(n, n, q) = 1 and q = 1, read by rows.

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 5
5 1
6 1
7 15
8 15
9 1
10 1
11 37
12 95
13 37
14 1
15 1
16 82
17 463
18 463
19 82
20 1
21 1
22 173
23 1910
24 3799
25 1910
26 173
27 1
28 1
29 356
30 7096
31 25672
32 25672
33 7096
34 356
35 1
36 1
37 723
38 24645
39 150994
40 260519
41 150994
42 24645
43 723
44 1
45 1
46 1458
47 81499
48 804875
49 2259903
50 2259903
51 804875
52 81499
53 1458
54 1

List of values

[1, 1, 1, 1, 5, 1, 1, 15, 15, 1, 1, 37, 95, 37, 1, 1, 82, 463, 463, 82, 1, 1, 173, 1910, 3799, 1910, 173, 1, 1, 356, 7096, 25672, 25672, 7096, 356, 1, 1, 723, 24645, 150994, 260519, 150994, 24645, 723, 1, 1, 1458, 81499, 804875, 2259903, 2259903, 804875, 81499, 1458, 1]