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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.

A225221 Number of lattice paths without interior points from {4}^n to {0}^n using steps that decrement one component by 1.

Table of values

n a(n)
0 1
1 0
2 2
3 2550
4 8059800
5 57010275000
6 801652441590000
7 20393765925943410000
8 872251852597491366000000
9 59194435154364480600630000000
10 6083868079208428011546743700000000
11 911478727065442542708032537906700000000
12 192819174440695429545254134608441231600000000

List of values

[1, 0, 2, 2550, 8059800, 57010275000, 801652441590000, 20393765925943410000, 872251852597491366000000, 59194435154364480600630000000, 6083868079208428011546743700000000, 911478727065442542708032537906700000000, 192819174440695429545254134608441231600000000]

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

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