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.

A203989 Array: row n shows the coefficients of the characteristic polynomial of the n-th principal submatrix of {max(i,j)} (A051125).

Table of values

n a(n)
1 1
2 -1
3 -2
4 -3
5 1
6 3
7 11
8 6
9 -1
10 -4
11 -23
12 -35
13 -10
14 1
15 5
16 39
17 98
18 85
19 15
20 -1
21 -6
22 -59
23 -207
24 -308
25 -175
26 -21
27 1
28 7
29 83
30 374
31 795
32 798
33 322
34 28
35 -1
36 -8
37 -111
38 -611
39 -1694
40 -2475
41 -1806
42 -546
43 -36
44 1
45 9
46 143
47 930
48 3185
49 6149
50 6633
51 3696
52 870
53 45

List of values

[1, -1, -2, -3, 1, 3, 11, 6, -1, -4, -23, -35, -10, 1, 5, 39, 98, 85, 15, -1, -6, -59, -207, -308, -175, -21, 1, 7, 83, 374, 795, 798, 322, 28, -1, -8, -111, -611, -1694, -2475, -1806, -546, -36, 1, 9, 143, 930, 3185, 6149, 6633, 3696, 870, 45]