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.

A297308 Number of n X n 0..1 arrays with every 1 horizontally or antidiagonally adjacent to 1 or 2 neighboring 1's.

Table of values

n a(n)
1 1
2 7
3 117
4 3808
5 484808
6 200646607
7 197589351469
8 578079526400673
9 5377924483062338484
10 139752957415982420114129
11 10302206214700301342887034910
12 2267938084956284272782357464419480

List of values

[1, 7, 117, 3808, 484808, 200646607, 197589351469, 578079526400673, 5377924483062338484, 139752957415982420114129, 10302206214700301342887034910, 2267938084956284272782357464419480]

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

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