A253341 Number of (n+2)X(7+2) nonnegative integer arrays with all values the knight distance from the upper left minus as much as 3, with successive minimum path knight move differences either 0 or +1, and any unreachable value zero.

319172, 7426426, 237047904, 6203113283, 143441370184, 3788905574401, 98349771149487, 1926953342923239, 46982876350047054, 912616386638325080, 16956678061495627361, 235791177168459306126, 4988065327432414551378

Offset

1,1

Comments

Column 7 of A253342.

Links

R. H. Hardin, Table of n, a(n) for n = 1..63

Example

Some solutions for n=1
..0..1..0..1..1..1..2..2..2....0..1..1..0..0..1..1..2..1
..0..2..0..1..1..2..2..2..3....1..1..0..1..1..1..1..1..2
..1..0..1..1..1..2..2..3..2....0..0..1..1..0..1..1..2..1
Knight distance matrix for n=1
..0..3..2..3..2..3..4..5..4
..3..4..1..2..3..4..3..4..5
..2..1..4..3..2..3..4..5..4

Crossrefs

Sequence in context: A186623 A202468 A251528 * A210317 A205931 A236318

Adjacent sequences: A253338 A253339 A253340 * A253342 A253343 A253344

Keyword

nonn

Author

R. H. Hardin, Dec 30 2014

Status

approved