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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.

A071799 Number of lattice paths in the lattice [0..2n] X [0..2n] which do not pass through the point (n,n).

Table of values

n a(n)
1 2
2 34
3 524
4 7970
5 121252
6 1850380
7 28337976
8 435443490
9 6711230900
10 103711749284
11 1606464657096
12 24935144010764
13 387746052588104
14 6039349005200440
15 94203136553911024
16 1471326505700038434
17 23007323485217888340
18 360154459563530689204
19 5643332975601670914600

List of values

[2, 34, 524, 7970, 121252, 1850380, 28337976, 435443490, 6711230900, 103711749284, 1606464657096, 24935144010764, 387746052588104, 6039349005200440, 94203136553911024, 1471326505700038434, 23007323485217888340, 360154459563530689204, 5643332975601670914600]

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

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