OFFSET
1,4
LINKS
Eric Weisstein's World of Mathematics, Antipodal Graph
EXAMPLE
For n=1, K_1 is trivially antipodal, so a(1)=1.
For n=2, K_2=P_2 is antipodal, so a(2)=1.
For n=3, neither K_3=C_3 nor P_3 is antipodal, so a(3)=0.
For n=4, P_4 and C_4 are antipodal, so a(4)=2.
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Eric W. Weisstein, Nov 23 2021
STATUS
approved