OFFSET
1,1
COMMENTS
A range-n leprechaun is a fairy chess piece that can move to any square within range n, and to any square that a queen can move to. A range-1 leprechaun is a queen and a range-2 leprechaun is a superqueen. (Escamocher and O'Sullivan 2021)
LINKS
Guillaume Escamocher and Barry O'Sullivan, Leprechauns on the chessboard, Discrete Mathematics, 344(5), 2021.
FORMULA
If n is odd, a(n) = (n+1)^2. If n is even, a(n) > (n+1)^2. (Escamocher and O'Sullivan 2021)
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Guillaume Escamocher, May 03 2021
STATUS
approved