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.

A122948 First row sum of the 5 X 5 matrix M^n, where M = {{0, -1, 0, 0, 0}, {-1, 1, -1, 0, 0}, {0, -1, 1, -1, 0}, {0, 0, -1, 1, -1}, {0, 0, 0, -1, 1}}, n>=0.

Table of values

n a(n)
0 1
1 -1
2 1
3 -1
4 1
5 0
6 4
7 10
8 33
9 93
10 264
11 729
12 1999
13 5437
14 14726
15 39757
16 107118
17 288201
18 774672
19 2080936
20 5587388
21 14997840
22 40249449
23 108001720
24 289774494
25 777430359
26 2085660586
27 5595162045
28 15009725921
29 40264911876
30 108013136968
31 289750079191
32 777264097335
33 2085030095791

List of values

[1, -1, 1, -1, 1, 0, 4, 10, 33, 93, 264, 729, 1999, 5437, 14726, 39757, 107118, 288201, 774672, 2080936, 5587388, 14997840, 40249449, 108001720, 289774494, 777430359, 2085660586, 5595162045, 15009725921, 40264911876, 108013136968, 289750079191, 777264097335, 2085030095791]