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.

A295034 Number of n X n 0..1 arrays with each 1 horizontally or vertically adjacent to 1 or 2 1's.

Table of values

n a(n)
1 1
2 10
3 140
4 6686
5 898493
6 355281224
7 411280569141
8 1377458578461777
9 13439667379225204666
10 381706479329790703639253
11 31542814403404743062254741113
12 7585239934805237805543429969496485

List of values

[1, 10, 140, 6686, 898493, 355281224, 411280569141, 1377458578461777, 13439667379225204666, 381706479329790703639253, 31542814403404743062254741113, 7585239934805237805543429969496485]

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

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