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.

A159035 a(0)=1=a(1), a(2)=2, a(3)=5; thereafter a(n+3)=4*a(n+2)-4*a(n+1)+2*a(n) for n>=1.

Table of values

n a(n)
0 1
1 1
2 2
3 5
4 14
5 40
6 114
7 324
8 920
9 2612
10 7416
11 21056
12 59784
13 169744
14 481952
15 1368400
16 3885280
17 11031424
18 31321376
19 88930368
20 252498816
21 716916544
22 2035531648
23 5779458048
24 16409538688
25 46591385856
26 132286304768
27 375598753024

List of values

[1, 1, 2, 5, 14, 40, 114, 324, 920, 2612, 7416, 21056, 59784, 169744, 481952, 1368400, 3885280, 11031424, 31321376, 88930368, 252498816, 716916544, 2035531648, 5779458048, 16409538688, 46591385856, 132286304768, 375598753024]