OFFSET
3,3
COMMENTS
a(18) >= 61.
LINKS
Donald E Knuth, The Art of Computer Programming, exercises on "knight grids" in Section 7.2.2.3 (preliminary draft)
Donald Knuth, CWEB program
EXAMPLE
a(6) = 4 because of the following embedding of P4 X P4 into N6:
- - - 1 - -
- 1 3 - 1 - where the vertices of P4 X P4 are
3 - 1 3 2 - 1 2 3 4
- 3 2 4 - 2 1 2 3 4
- 4 - 2 4 - 1 2 3 4
- - 4 - - - 1 2 3 4
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Don Knuth, Feb 10 2022
STATUS
approved