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.

A120013 Square table, read by antidiagonals, of coefficients of x^k in the n-th self-composition of the g.f. of A120009, so that: T(n,k) = [x^k] { (x-x^2) o x/(1-n*x) o (1-sqrt(1-4*x))/2 } for n>=1, k>=1.

Table of values

n a(n)
1 1
2 1
3 1
4 1
5 2
6 1
7 1
8 3
9 4
10 0
11 1
12 4
13 9
14 6
15 -6
16 1
17 5
18 16
19 24
20 -4
21 -33
22 1
23 6
24 25
25 60
26 42
27 -100
28 -143
29 1
30 7
31 36
32 120
33 192
34 -87
35 -664
36 -572
37 1
38 8
39 49
40 210
41 530
42 360
43 -1575
44 -3514
45 -2210
46 1
47 9
48 64
49 336
50 1164
51 1955
52 -1568
53 -12240
54 -16916
55 -8398
56 1
57 10
58 81
59 504
60 2226
61 5892
62 3785
63 -26804
64 -77730
65 -77388
66 -31654

List of values

[1, 1, 1, 1, 2, 1, 1, 3, 4, 0, 1, 4, 9, 6, -6, 1, 5, 16, 24, -4, -33, 1, 6, 25, 60, 42, -100, -143, 1, 7, 36, 120, 192, -87, -664, -572, 1, 8, 49, 210, 530, 360, -1575, -3514, -2210, 1, 9, 64, 336, 1164, 1955, -1568, -12240, -16916, -8398, 1, 10, 81, 504, 2226, 5892, 3785, -26804, -77730, -77388, -31654]