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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.

A076657 a(n) = (1/24) * binomial(2n,n)*(16^n-binomial(2n,n)^2). Right side of identity involving series A005148.

Table of values

n a(n)
0 0
1 1
2 55
3 3080
4 176855
5 10343256
6 613052440
7 36701926976
8 2214353424855
9 134425330290680
10 8201448540559560
11 502460159228920256
12 30890758976011469080
13 1904794982716556862400
14 117756015163729064222400
15 7296082202981986626900480
16 452950299939910627966962135

List of values

[0, 1, 55, 3080, 176855, 10343256, 613052440, 36701926976, 2214353424855, 134425330290680, 8201448540559560, 502460159228920256, 30890758976011469080, 1904794982716556862400, 117756015163729064222400, 7296082202981986626900480, 452950299939910627966962135]

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

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