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.

A201699 Number of nX7 0..2 arrays with rows and columns lexicographically nondecreasing read forwards and nonincreasing read backwards.

Table of values

n a(n)
1 3
2 60
3 3838
4 607919
5 142436489
6 27102769900
7 3262897246338
8 253484699853930
9 13657827589827288
10 542530203631847499
11 16634470482072064655
12 407700696414920035296
13 8211702473582080609860
14 139013768818199221546289

List of values

[3, 60, 3838, 607919, 142436489, 27102769900, 3262897246338, 253484699853930, 13657827589827288, 542530203631847499, 16634470482072064655, 407700696414920035296, 8211702473582080609860, 139013768818199221546289]

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

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