OFFSET
2,1
COMMENTS
All terms are even.
The number of half-infinite line segments formed is 2*A000125(n) (twice the number of distinct lines).
LINKS
Pontus von Brömssen, Illustration for n = 2.
Pontus von Brömssen, Illustration for n = 3.
Pontus von Brömssen, Illustration for n = 4.
Pontus von Brömssen, Illustration for n = 5.
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Pontus von Brömssen, Mar 23 2024
STATUS
approved