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.

A204113 Array: row n shows the coefficients of the characteristic polynomial of the n-th principal submatrix of the matrix at A204112, given by f(i,j) = gcd(F(i+1), F(j+1)), where F=A000045 (Fibonacci numbers).

Table of values

n a(n)
1 1
2 -1
3 1
4 -3
5 1
6 2
7 -8
8 6
9 -1
10 8
11 -36
12 35
13 -11
14 1
15 48
16 -232
17 274
18 -116
19 19
20 -1
21 576
22 -2880
23 3620
24 -1728
25 358
26 -32
27 1
28 10368
29 -52992
30 70632
31 -37192
32 8906
33 -1016
34 53
35 -1
36 331776
37 -1716480
38 2354112
39 -1294352
40 332812
41 -42924
42 2805

List of values

[1, -1, 1, -3, 1, 2, -8, 6, -1, 8, -36, 35, -11, 1, 48, -232, 274, -116, 19, -1, 576, -2880, 3620, -1728, 358, -32, 1, 10368, -52992, 70632, -37192, 8906, -1016, 53, -1, 331776, -1716480, 2354112, -1294352, 332812, -42924, 2805]