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.

A183316 Number of nX4 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 8
2 27
3 124
4 480
5 1975
6 7833
7 31428
8 125103
9 498825
10 1985956
11 7906167
12 31469417
13 125232138
14 498389829
15 1983161935
16 7891800110
17 31402125248
18 124956937711
19 497214816218
20 1978508290987
21 7872687718931
22 31326612697486
23 124652113265387

List of values

[8, 27, 124, 480, 1975, 7833, 31428, 125103, 498825, 1985956, 7906167, 31469417, 125232138, 498389829, 1983161935, 7891800110, 31402125248, 124956937711, 497214816218, 1978508290987, 7872687718931, 31326612697486, 124652113265387]

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

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