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.

A099215 a(n)=4a(n-1)-4a(n-2)+3a(n-3).

Table of values

n a(n)
0 1
1 2
2 4
3 11
4 34
5 104
6 313
7 938
8 2812
9 8435
10 25306
11 75920
12 227761
13 683282
14 2049844
15 6149531
16 18448594
17 55345784
18 166037353
19 498112058
20 1494336172
21 4483008515
22 13449025546
23 40347076640
24 121041229921
25 363123689762
26 1089371069284

List of values

[1, 2, 4, 11, 34, 104, 313, 938, 2812, 8435, 25306, 75920, 227761, 683282, 2049844, 6149531, 18448594, 55345784, 166037353, 498112058, 1494336172, 4483008515, 13449025546, 40347076640, 121041229921, 363123689762, 1089371069284]

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

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