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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.

A055273 a(n) = 3*a(n-1) - a(n-2) with a(0) = 1, a(1) = 8.

Table of values

n a(n)
0 1
1 8
2 23
3 61
4 160
5 419
6 1097
7 2872
8 7519
9 19685
10 51536
11 134923
12 353233
13 924776
14 2421095
15 6338509
16 16594432
17 43444787
18 113739929
19 297775000
20 779585071
21 2040980213
22 5343355568
23 13989086491
24 36623903905
25 95882625224
26 251023971767
27 657189290077
28 1720543898464

List of values

[1, 8, 23, 61, 160, 419, 1097, 2872, 7519, 19685, 51536, 134923, 353233, 924776, 2421095, 6338509, 16594432, 43444787, 113739929, 297775000, 779585071, 2040980213, 5343355568, 13989086491, 36623903905, 95882625224, 251023971767, 657189290077, 1720543898464]

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

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