[seqfan] Simple sequence not in the OEIS?
Lars Blomberg
lars.blomberg2 at hotmail.com
Wed Jun 7 15:15:55 CEST 2023
Hello Seqfans,
I have been looking at how many different space filling paths there are in a n x n lattice, starting from the SW corner in the N direction, and stepping in N,S,E,W directions only, counted up to rotations and reflections.
There are 3 solutions for n=3:
+--+--+ +--+--+ +--+ +
| | | | | | |
+ + + + +--+ + + +
| | | | | | | |
+ +--+ + +--+ + +--+
The sequence starts with n=2: 1, 3, 23, 347, 10199, 683227, ...
What puzzles me is that such a relatively simple sequence is not present in OEIS even though there are a great many sequences concerning paths on square lattices.
Maybe I have made some stupid mistake.
Any clarifying information will be appreciated.
/Lars B
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