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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.

A184754 Half the number of n X n binary arrays with no 1 having an adjacent 1 both above and to its left.

Table of values

n a(n)
1 1
2 7
3 163
4 12397
5 3110914
6 2568513843
7 6982256142285
8 62483420093901107
9 1840782554883258104105
10 178527915853668578288219231
11 57000185549334885919706636039360
12 59911857895558455825087768017439269698

List of values

[1, 7, 163, 12397, 3110914, 2568513843, 6982256142285, 62483420093901107, 1840782554883258104105, 178527915853668578288219231, 57000185549334885919706636039360, 59911857895558455825087768017439269698]

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

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