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.

A207751 Number of nX7 0..1 arrays avoiding 0 0 1 and 0 1 1 horizontally and 0 0 1 and 1 0 0 vertically.

Table of values

n a(n)
1 20
2 400
3 2340
4 9450
5 51590
6 247860
7 1341606
8 6978660
9 38171520
10 206898250
11 1147824290
12 6372877952
13 35814768750
14 201958261240
15 1147016892780
16 6537970767786
17 37441623486062
18 215093421143100
19 1239764709916950

List of values

[20, 400, 2340, 9450, 51590, 247860, 1341606, 6978660, 38171520, 206898250, 1147824290, 6372877952, 35814768750, 201958261240, 1147016892780, 6537970767786, 37441623486062, 215093421143100, 1239764709916950]

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

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