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.

A183313 Number of n X n binary arrays with an element zero only if there are an even number of ones to its left and an even number of ones above it.

Table of values

n a(n)
1 2
2 6
3 43
4 480
5 11385
6 455509
7 35629548
8 4963103592
9 1301324910599
10 621440459491278
11 550719742223029437
12 895987628972185952650
13 2692063790042095644897446
14 14888067283069842424203964441

List of values

[2, 6, 43, 480, 11385, 455509, 35629548, 4963103592, 1301324910599, 621440459491278, 550719742223029437, 895987628972185952650, 2692063790042095644897446, 14888067283069842424203964441]

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

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