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.

A111235 a(1)=a(2)=a(3)=a(4)=1. For n >= 5, a(n)= a(n-1)*a(n-2) + a(n-3)*a(n-4).

Table of values

n a(n)
1 1
2 1
3 1
4 1
5 2
6 3
7 7
8 23
9 167
10 3862
11 645115
12 2491437971
13 1607264007306619
14 4004398577225334507664179
15 6436125704084114770053956998574742562466
16 25772812612277833490303309040566300172816894832780792086674335463

List of values

[1, 1, 1, 1, 2, 3, 7, 23, 167, 3862, 645115, 2491437971, 1607264007306619, 4004398577225334507664179, 6436125704084114770053956998574742562466, 25772812612277833490303309040566300172816894832780792086674335463]