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.

A270861 Irregular triangle read by rows: numerators of the coefficients of polynomials J(2n-1,z) = Sum_(k=1,2, .. n) ((n+1)^2 - k + (n+1-k)*z^n)*z^(k-1)/k.

Table of values

n a(n)
1 3
2 1
3 8
4 7
5 2
6 1
7 15
8 7
9 13
10 3
11 1
12 1
13 24
14 23
15 22
16 21
17 4
18 3
19 2
20 1
21 35
22 17
23 11
24 8
25 31
26 5
27 2
28 1
29 1
30 1
31 48
32 47
33 46
34 45
35 44
36 43
37 6
38 5
39 4
40 3
41 2
42 1
43 63
44 31
45 61
46 15
47 59
48 29
49 57
50 7
51 3
52 5
53 1
54 3
55 1
56 1
57 80
58 79
59 26
60 77
61 76
62 25
63 74
64 73
65 8
66 7
67 2
68 5
69 4
70 1
71 2
72 1

List of values

[3, 1, 8, 7, 2, 1, 15, 7, 13, 3, 1, 1, 24, 23, 22, 21, 4, 3, 2, 1, 35, 17, 11, 8, 31, 5, 2, 1, 1, 1, 48, 47, 46, 45, 44, 43, 6, 5, 4, 3, 2, 1, 63, 31, 61, 15, 59, 29, 57, 7, 3, 5, 1, 3, 1, 1, 80, 79, 26, 77, 76, 25, 74, 73, 8, 7, 2, 5, 4, 1, 2, 1]