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.

A262268 Number of (n+2) X (2+2) 0..1 arrays with each row and column divisible by 5, read as a binary number with top and left being the most significant bits.

Table of values

n a(n)
1 4
2 16
3 49
4 169
5 676
6 2704
7 10609
8 42025
9 168100
10 672400
11 2686321
12 10738729
13 42954916
14 171819664
15 687226225
16 2748800041
17 10995200164
18 43980800656
19 175922363761
20 703687777321
21 2814751109284
22 11259004437136
23 45036004326769

List of values

[4, 16, 49, 169, 676, 2704, 10609, 42025, 168100, 672400, 2686321, 10738729, 42954916, 171819664, 687226225, 2748800041, 10995200164, 43980800656, 175922363761, 703687777321, 2814751109284, 11259004437136, 45036004326769]

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

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