OFFSET
1,3
COMMENTS
The 24 neighborhood vectors are [0, +-1, +-2] (four choices of signs) and its six permutations.
Identifying reflections as well gives A363382.
CROSSREFS
KEYWORD
nonn,hard,more
AUTHOR
Joerg Arndt and Márk Péter Légrádi, May 30 2023
STATUS
approved