cp's OEIS Frontend

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.

A221621 Number of nX6 arrays with each row a permutation of 1..6 having at least as many downsteps as the preceding row.

Table of values

n a(n)
1 720
2 353654
3 148700748
4 57614883627
5 21241004664348
6 7575106427737240
7 2638115823321645192
8 902542985526634773509
9 304529313276100670030616
10 101620178879261858322711162
11 33604296810830843896378600020

List of values

[720, 353654, 148700748, 57614883627, 21241004664348, 7575106427737240, 2638115823321645192, 902542985526634773509, 304529313276100670030616, 101620178879261858322711162, 33604296810830843896378600020]

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

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