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.

A001835 a(n) = 4*a(n-1) - a(n-2), with a(0) = 1, a(1) = 1.

Table of values

n a(n)
0 1
1 1
2 3
3 11
4 41
5 153
6 571
7 2131
8 7953
9 29681
10 110771
11 413403
12 1542841
13 5757961
14 21489003
15 80198051
16 299303201
17 1117014753
18 4168755811
19 15558008491
20 58063278153
21 216695104121
22 808717138331
23 3018173449203
24 11263976658481
25 42037733184721
26 156886956080403
27 585510091136891

List of values

[1, 1, 3, 11, 41, 153, 571, 2131, 7953, 29681, 110771, 413403, 1542841, 5757961, 21489003, 80198051, 299303201, 1117014753, 4168755811, 15558008491, 58063278153, 216695104121, 808717138331, 3018173449203, 11263976658481, 42037733184721, 156886956080403, 585510091136891]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement.