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.

A250425 Number of (n+1) X (n+1) 0..1 arrays with nondecreasing sum of every two consecutive values in every row and column.

Table of values

n a(n)
1 16
2 108
3 1296
4 12000
5 160000
6 1715000
7 24010000
8 280052640
9 4032758016
10 49700008512
11 728933458176
12 9337998878208
13 138735983333376
14 1829038842774000
15 27435582641610000
16 369797030228340000
17 5588044012339360000

List of values

[16, 108, 1296, 12000, 160000, 1715000, 24010000, 280052640, 4032758016, 49700008512, 728933458176, 9337998878208, 138735983333376, 1829038842774000, 27435582641610000, 369797030228340000, 5588044012339360000]

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

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