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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.

A137334 Number of n X n crossword puzzles with dihedral symmetry group, for n odd. Acceptable crossword puzzles must have all words of length 3 or more, at least one word in each row and each column and be connected.

Table of values

n a(n)
3 1
4 2
5 10
6 45
7 302
8 3102
9 45795

List of values

[1, 2, 10, 45, 302, 3102, 45795]

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

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