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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.

A225831 Number of binary pattern classes in the (7,n)-rectangular grid: two patterns are in the same class if one of them can be obtained by a reflection or 180-degree rotation of the other.

Table of values

n a(n)
0 1
1 72
2 4224
3 529920
4 67133440
5 8590786560
6 1099516870656
7 140737630961664
8 18014399717441536
9 2305843036057239552
10 295147905471410601984
11 37778931868592158801920
12 4835703278531084466257920
13 618970019643974367030804480
14 79228162514282633467030142976
15 10141204801826143708548100521984
16 1298074214633711554847439528656896
17 166153499473114560494025562738655232

List of values

[1, 72, 4224, 529920, 67133440, 8590786560, 1099516870656, 140737630961664, 18014399717441536, 2305843036057239552, 295147905471410601984, 37778931868592158801920, 4835703278531084466257920, 618970019643974367030804480, 79228162514282633467030142976, 10141204801826143708548100521984, 1298074214633711554847439528656896, 166153499473114560494025562738655232]

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

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