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.

A383700 Coefficient of x^2 in expansion of (x+1) * (x+5) * ... * (x+4*n-3).

Table of values

n a(n)
0 0
1 0
2 1
3 15
4 254
5 5130
6 122119
7 3365089
8 105599276
9 3722336388
10 145717348221
11 6275071262691
12 294890141047050
13 15020233818893550
14 824373714907080675
15 48505985450168267925
16 3046201904592803410200
17 203381159927362120499400
18 14385952383695375700375225

List of values

[0, 0, 1, 15, 254, 5130, 122119, 3365089, 105599276, 3722336388, 145717348221, 6275071262691, 294890141047050, 15020233818893550, 824373714907080675, 48505985450168267925, 3046201904592803410200, 203381159927362120499400, 14385952383695375700375225]

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

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