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.

A087452 G.f.: (2-x)/((1+3x)(1-4x)); e.g.f.: exp(4x) + exp(-3x); a(n) = 4^n + (-3)^n.

Table of values

n a(n)
0 2
1 1
2 25
3 37
4 337
5 781
6 4825
7 14197
8 72097
9 242461
10 1107625
11 4017157
12 17308657
13 65514541
14 273218425
15 1059392917
16 4338014017
17 17050729021
18 69106897225
19 273715645477
20 1102998412177
21 4387586157901
22 17623567104025
23 70274600998837
24 281757406247137

List of values

[2, 1, 25, 37, 337, 781, 4825, 14197, 72097, 242461, 1107625, 4017157, 17308657, 65514541, 273218425, 1059392917, 4338014017, 17050729021, 69106897225, 273715645477, 1102998412177, 4387586157901, 17623567104025, 70274600998837, 281757406247137]