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.

A207423 Number of nX5 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 1 and 0 1 0 vertically.

Table of values

n a(n)
1 15
2 225
3 1425
4 8463
5 55361
6 341329
7 2048823
8 12436631
9 75326185
10 453869325
11 2736999545
12 16513415365
13 99553034715
14 600117044821
15 3618247957621
16 21813452529627
17 131499832021425
18 792759625024175
19 4779237788051311

List of values

[15, 225, 1425, 8463, 55361, 341329, 2048823, 12436631, 75326185, 453869325, 2736999545, 16513415365, 99553034715, 600117044821, 3618247957621, 21813452529627, 131499832021425, 792759625024175, 4779237788051311]

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

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