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.

A185407 1/7 the number of nX4 0..6 arrays with every element equal to exactly one or two of its horizontal and vertical neighbors.

Table of values

n a(n)
1 7
2 1848
3 279918
4 53808534
5 9560464068
6 1755419411964
7 318289797234978
8 58009184105051760
9 10550717546713596858
10 1920558372882730002666
11 349484670721711744198032
12 63604421284059206327321532

List of values

[7, 1848, 279918, 53808534, 9560464068, 1755419411964, 318289797234978, 58009184105051760, 10550717546713596858, 1920558372882730002666, 349484670721711744198032, 63604421284059206327321532]

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

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