OFFSET
1,2
LINKS
Jean-François Alcover, Table of n, a(n) for n = 1..12
Eric Weisstein's World of Mathematics, Edge Cover
Eric Weisstein's World of Mathematics, Grid Graph
MATHEMATICA
a[n_] := A286912[[2 n^2 - 2 n + 1]]; a[1] = 1;
Table[a[n], {n, 1, 12}] (* Jean-François Alcover, Sep 23 2019 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Andrew Howroyd, May 15 2017
EXTENSIONS
a(1) corrected by Andrew Howroyd, Jan 29 2023
STATUS
approved