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.

A125641 Square of the (3,1)-entry of the 3 X 3 matrix M^n, where M = [1,0,0; 1,1,0; 1,i,1].

Table of values

n a(n)
1 1
2 5
3 18
4 52
5 125
6 261
7 490
8 848
9 1377
10 2125
11 3146
12 4500
13 6253
14 8477
15 11250
16 14656
17 18785
18 23733
19 29602
20 36500
21 44541
22 53845
23 64538
24 76752
25 90625
26 106301
27 123930
28 143668
29 165677
30 190125
31 217186
32 247040
33 279873
34 315877
35 355250
36 398196
37 444925

List of values

[1, 5, 18, 52, 125, 261, 490, 848, 1377, 2125, 3146, 4500, 6253, 8477, 11250, 14656, 18785, 23733, 29602, 36500, 44541, 53845, 64538, 76752, 90625, 106301, 123930, 143668, 165677, 190125, 217186, 247040, 279873, 315877, 355250, 398196, 444925]