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A323469
On a spirally numbered square grid, with labels starting at 1, this is the number of steps that a (1,n) leaper makes before getting trapped, or -1 if it never gets trapped.
11
-1, 2016, 3723, 13103, 14570, 26967, 101250, 158735, 132688, 220439, 144841, 646728, 350720, 66183, 75259, 248764, 118694, 307483, 238208, 189159, 139639, 183821, 151016, 171076, 114187, 262235, 178612, 257632, 124475, 178862, 143674, 196795, 60707, 309820
OFFSET
1,2
COMMENTS
A (1,2) leaper is a chess knight.
a(2)-a(5) were computed by Daniël Karssen.
LINKS
N. J. A. Sloane and Brady Haran, The Trapped Knight, Numberphile video (2019)
CROSSREFS
The sequences involved in this set of related sequences are A316884, A316967, A316667, A316328, A317106, A317105, A317416, A317415, A317438, A317437, and A323469, A323470, A323471, A323472.
Sequence in context: A189188 A076582 A323749 * A343178 A125491 A166818
KEYWORD
sign
AUTHOR
N. J. A. Sloane, Jan 28 2019
EXTENSIONS
More terms from Rémy Sigrist, Jan 29 2019
STATUS
approved