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.

A302308 Number of nX7 0..1 arrays with every element equal to 0, 1, 3 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Table of values

n a(n)
1 21
2 363
3 275
4 2048
5 4772
6 18992
7 76642
8 364922
9 1991487
10 11850372
11 74391348
12 486418706
13 3257213385
14 22149432404
15 152046330078
16 1049873091893
17 7276150005243
18 50546516116050
19 351666937737820
20 2449012961612884

List of values

[21, 363, 275, 2048, 4772, 18992, 76642, 364922, 1991487, 11850372, 74391348, 486418706, 3257213385, 22149432404, 152046330078, 1049873091893, 7276150005243, 50546516116050, 351666937737820, 2449012961612884]

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

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