OFFSET
2,1
COMMENTS
Worthy of consideration to introduce slopes in the math classroom.
a(7) >= 23 and a(8) >= 29, see illustration in Links.
LINKS
Hiroaki Yamanouchi, Examples
Giovanni Resta, Illustration of a(7)>=23 and a(8)>=29
EXAMPLE
a(3) = 5 because of this quadrilateral in a 3 x 3 square:
1 2 .
. 4 .
5 . 3
a(4) = 8 because of this polygon:
1 3 . 4
. . 2 6
. . 5 7
. 8 . .
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Gordon Hamilton, Mar 13 2015
EXTENSIONS
a(5)-a(6) corrected by Hiroaki Yamanouchi, Mar 14 2015
STATUS
approved