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.

A302268 Number of 4 X n 0..1 arrays with every element equal to 0, 1, 2 or 3 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Table of values

n a(n)
1 8
2 128
3 818
4 5922
5 40296
6 284428
7 1984001
8 13858979
9 96989344
10 677924227
11 4741556252
12 33160693907
13 231908861764
14 1621957375639
15 11343626172102
16 79335892155345
17 554866483249174
18 3880672405834657
19 27141030302203992

List of values

[8, 128, 818, 5922, 40296, 284428, 1984001, 13858979, 96989344, 677924227, 4741556252, 33160693907, 231908861764, 1621957375639, 11343626172102, 79335892155345, 554866483249174, 3880672405834657, 27141030302203992]

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

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