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.

A250966 Number of (n+1)X(n+1) 0..1 arrays with no 2X2 subblock having the sum of its diagonal elements less than the absolute difference of its antidiagonal elements.

Table of values

n a(n)
1 14
2 308
3 22048
4 5089900
5 3794909318
6 9135168475316
7 71001116832347962
8 1781714118279963697630
9 144355770055582148091515150
10 37761829882206405363232456330430
11 31892938416369811765366547510541575588

List of values

[14, 308, 22048, 5089900, 3794909318, 9135168475316, 71001116832347962, 1781714118279963697630, 144355770055582148091515150, 37761829882206405363232456330430, 31892938416369811765366547510541575588]

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

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