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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.

A177784 a(n) = binomial(n^2, n) / ( n*(n+1) ).

Table of values

n a(n)
2 1
3 7
4 91
5 1771
6 46376
7 1533939
8 61474519
9 2898753715
10 157366449604
11 9672348219898
12 664226242466073
13 50419551102990876
14 4193002458968329488
15 379189865879906158731
16 37054233830964389244975

List of values

[1, 7, 91, 1771, 46376, 1533939, 61474519, 2898753715, 157366449604, 9672348219898, 664226242466073, 50419551102990876, 4193002458968329488, 379189865879906158731, 37054233830964389244975]

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

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