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.

A121230 First Hadamard-Sylvester matrix self -similar matrix based on the Padovan/ Minimal Pisot 3 X 3 matrix as an 9 X 9 matrix: Characteristic Polynomial:1 - x - x^3 - x^4 - x^5 + 3 x^6 + 2 x^7 - x^9.

Table of values

n a(n)
1 0
2 13
3 5
4 22
5 42
6 54
7 126
8 192
9 347
10 631
11 1056
12 1914
13 3320
14 5814
15 10276
16 17921
17 31549
18 55338
19 97026
20 170454
21 298914
22 524684
23 920815
24 1615647
25 2835660
26 4975898
27 8732160
28 15324202
29 26891432
30 47191909
31 82815621
32 145331022
33 255039162

List of values

[0, 13, 5, 22, 42, 54, 126, 192, 347, 631, 1056, 1914, 3320, 5814, 10276, 17921, 31549, 55338, 97026, 170454, 298914, 524684, 920815, 1615647, 2835660, 4975898, 8732160, 15324202, 26891432, 47191909, 82815621, 145331022, 255039162]