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.

A109106 a(n) = (1/sqrt(5))*((sqrt(5) + 1)*((15 + 5*sqrt(5))/2)^(n-1) + (sqrt(5) - 1)*((15 - 5*sqrt(5))/2)^(n-1)).

Table of values

n a(n)
1 2
2 20
3 250
4 3250
5 42500
6 556250
7 7281250
8 95312500
9 1247656250
10 16332031250
11 213789062500
12 2798535156250
13 36633300781250
14 479536132812500
15 6277209472656250
16 82169738769531250
17 1075615844726562500

List of values

[2, 20, 250, 3250, 42500, 556250, 7281250, 95312500, 1247656250, 16332031250, 213789062500, 2798535156250, 36633300781250, 479536132812500, 6277209472656250, 82169738769531250, 1075615844726562500]

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

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