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.

A387368 a(n) = Sum_{k=0..n} 2^k * 3^(n-k) * binomial(n+1,k) * binomial(n+1,n-k).

Table of values

n a(n)
0 1
1 10
2 93
3 860
4 7985
5 74550
6 699685
7 6597400
8 62457921
9 593346050
10 5653702637
11 54012503220
12 517192500721
13 4962377183470
14 47698928343285
15 459224987322800
16 4427611044899585
17 42744433267222650
18 413145666547033213
19 3997556929553596300
20 38718094094951086641

List of values

[1, 10, 93, 860, 7985, 74550, 699685, 6597400, 62457921, 593346050, 5653702637, 54012503220, 517192500721, 4962377183470, 47698928343285, 459224987322800, 4427611044899585, 42744433267222650, 413145666547033213, 3997556929553596300, 38718094094951086641]

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

Content is available under The OEIS End-User License Agreement.