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.

A215455 a(n) = 6*a(n-1) - 9*a(n-2) + a(n-3), with a(0)=3, a(1)=6 and a(2)=18.

Table of values

n a(n)
0 3
1 6
2 18
3 57
4 186
5 621
6 2109
7 7251
8 25146
9 87726
10 307293
11 1079370
12 3798309
13 13382817
14 47191491
15 166501902
16 587670810
17 2074699233
18 7325660010
19 25869337773
20 91359785781
21 322660334739
22 1139593274178
23 4024976418198
24 14216179376325
25 50211881768346
26 177350652641349

List of values

[3, 6, 18, 57, 186, 621, 2109, 7251, 25146, 87726, 307293, 1079370, 3798309, 13382817, 47191491, 166501902, 587670810, 2074699233, 7325660010, 25869337773, 91359785781, 322660334739, 1139593274178, 4024976418198, 14216179376325, 50211881768346, 177350652641349]