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.

A109110 a(n) = 2a(n-1) + a(n-2) - a(n-3); a(0)=4, a(1)=9, a(2)=20.

Table of values

n a(n)
0 4
1 9
2 20
3 45
4 101
5 227
6 510
7 1146
8 2575
9 5786
10 13001
11 29213
12 65641
13 147494
14 331416
15 744685
16 1673292
17 3759853
18 8448313
19 18983187
20 42654834
21 95844542
22 215360731
23 483911170
24 1087338529
25 2443227497
26 5489882353
27 12335653674
28 27717962204

List of values

[4, 9, 20, 45, 101, 227, 510, 1146, 2575, 5786, 13001, 29213, 65641, 147494, 331416, 744685, 1673292, 3759853, 8448313, 18983187, 42654834, 95844542, 215360731, 483911170, 1087338529, 2443227497, 5489882353, 12335653674, 27717962204]

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

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