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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.

A189653 Number of 5Xn array permutations with each element moving zero or one space horizontally, diagonally or antidiagonally.

Table of values

n a(n)
1 1
2 450
3 17655
4 2631821
5 250758892
6 30010432933
7 3292827578005
8 376678790309002
9 42358721253919843
10 4801283687544580305
11 542386040165423966236
12 61365524584279523157641
13 6938297347463763255984633

List of values

[1, 450, 17655, 2631821, 250758892, 30010432933, 3292827578005, 376678790309002, 42358721253919843, 4801283687544580305, 542386040165423966236, 61365524584279523157641, 6938297347463763255984633]

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

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