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.

A102307 a(n) = Fibonacci(2n+1) * binomial(2n,n).

Table of values

n a(n)
0 1
1 4
2 30
3 260
4 2380
5 22428
6 215292
7 2093520
8 20553390
9 203280220
10 2022339176
11 20215564824
12 202879303900
13 2042865050800
14 20629119101400
15 208829908532880
16 2118554718825420
17 21533269718832300
18 219235457827640100
19 2235446059461106800
20 22824647678376163620
21 233331794241184490280

List of values

[1, 4, 30, 260, 2380, 22428, 215292, 2093520, 20553390, 203280220, 2022339176, 20215564824, 202879303900, 2042865050800, 20629119101400, 208829908532880, 2118554718825420, 21533269718832300, 219235457827640100, 2235446059461106800, 22824647678376163620, 233331794241184490280]

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

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