OFFSET
0,4
LINKS
Andrew Howroyd, Table of n, a(n) for n = 0..1325 (rows n = 0..50)
Wikipedia, Jeson Mor.
FORMULA
EXAMPLE
Triangle starts
0;
-1, -1;
4, 1, 2;
2, 3, 2, 3;
4, 3, 2, 3, 2;
4, 3, 4, 3, 4, 3;
4, 5, 4, 3, 4, 3, 4;
6, 5, 4, 5, 4, 5, 4, 5;
6, 5, 6, 5, 4, 5, 4, 5, 4;
6, 7, 6, 5, 6, 5, 6, 5, 6, 5;
...
T(0, 1) = 0, because the board has just 1 square where the knight must start.
T(1, 1) and T(1, 2) = -1, because reaching the central square with a knight is not possible on a 3 X 3 board.
T(2, 1) = 4, because at least 4 moves are necessary on a 5 X 5 board to reach the central square when starting from a corner square.
T(2, 3) = 2 because 2 moves are necessary on a 5 X 5 board to reach the central square when starting from the middle of one side. - Andrew Howroyd, Feb 28 2020
CROSSREFS
AUTHOR
Felix Fröhlich, Dec 15 2016
EXTENSIONS
a(5) corrected and terms a(15) and beyond from Andrew Howroyd, Feb 28 2020
STATUS
approved