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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.

A337902 The number of walks of length 2n+1 on the square lattice that start from the origin (0,0) and end at the vertex (2,1).

Table of values

n a(n)
1 3
2 50
3 735
4 10584
5 152460
6 2208492
7 32207175
8 472780880
9 6982113996
10 103673813880
11 1546866469148
12 23179817220000
13 348690679038000
14 5263441096145400
15 79698007774092375
16 1210159553338375200
17 18422202264818467500
18 281089726445607849000

List of values

[3, 50, 735, 10584, 152460, 2208492, 32207175, 472780880, 6982113996, 103673813880, 1546866469148, 23179817220000, 348690679038000, 5263441096145400, 79698007774092375, 1210159553338375200, 18422202264818467500, 281089726445607849000]

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

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