OFFSET
3,1
LINKS
Eric Weisstein's World of Mathematics, Double Cone Graph.
Eric Weisstein's World of Mathematics, Minimum Edge Cover.
FORMULA
a(n) = 3*n^2 + 4*n if (n mod 2 = 0), otherwise 3*n^2. - Detlef Meya, Jun 20 2024
MATHEMATICA
a[n_] := If[Mod[n, 2] == 0, 3*n^2 + 4*n, 3*n^2]; Table[a[n], {n, 3, 44}] (* Detlef Meya, Jun 20 2024 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Eric W. Weisstein, May 26 2024
EXTENSIONS
a(10) and beyond from Detlef Meya, Jun 20 2024
STATUS
approved