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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.

A081015 a(n) = Lucas(4n+3) + 1, or 5*Fibonacci(2n+1)*Fibonacci(2n+2).

Table of values

n a(n)
0 5
1 30
2 200
3 1365
4 9350
5 64080
6 439205
7 3010350
8 20633240
9 141422325
10 969323030
11 6643838880
12 45537549125
13 312119004990
14 2139295485800
15 14662949395605
16 100501350283430
17 688846502588400
18 4721424167835365
19 32361122672259150
20 221806434537978680
21 1520283919093591605

List of values

[5, 30, 200, 1365, 9350, 64080, 439205, 3010350, 20633240, 141422325, 969323030, 6643838880, 45537549125, 312119004990, 2139295485800, 14662949395605, 100501350283430, 688846502588400, 4721424167835365, 32361122672259150, 221806434537978680, 1520283919093591605]

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

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