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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.

A269288 Number of nX7 0..3 arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling three no more than once.

Table of values

n a(n)
1 8748
2 11026764
3 10363900428
4 8642330207532
5 6751724437907820
6 5062027330721456172
7 3689070798270477232620
8 2633315774277280991138604
9 1850184391068250712299997676
10 1283831257986363807652886516268

List of values

[8748, 11026764, 10363900428, 8642330207532, 6751724437907820, 5062027330721456172, 3689070798270477232620, 2633315774277280991138604, 1850184391068250712299997676, 1283831257986363807652886516268]

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

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