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.

A173590 T(n, k) = k^n*U(n, (1/k + k)/2) + (n + 1)^(k - 1)*U(k - 1, (1/(n + 1) + n + 1)/2), where U(n,x) is the n-th Chebyshev polynomial of the second kind, square array read by antidiagonals (n >= 0, k >= 1).

Table of values

n a(n)
0 2
1 3
2 3
3 4
4 10
5 4
6 5
7 31
8 31
9 5
10 6
11 102
12 182
13 102
14 6
15 7
16 367
17 1093
18 1093
19 367
20 7
21 8
22 1402
23 8032
24 8738
25 8032
26 1402
27 8
28 9
29 5511
30 67763
31 86181
32 86181
33 67763
34 5511
35 9
36 10
37 21910
38 600322
39 1166470
40 813802
41 1166470
42 600322
43 21910
44 10
45 11
46 87463
47 5385001
48 18015797
49 11900131
50 11900131
51 18015797
52 5385001
53 87463
54 11

List of values

[2, 3, 3, 4, 10, 4, 5, 31, 31, 5, 6, 102, 182, 102, 6, 7, 367, 1093, 1093, 367, 7, 8, 1402, 8032, 8738, 8032, 1402, 8, 9, 5511, 67763, 86181, 86181, 67763, 5511, 9, 10, 21910, 600322, 1166470, 813802, 1166470, 600322, 21910, 10, 11, 87463, 5385001, 18015797, 11900131, 11900131, 18015797, 5385001, 87463, 11]