A209023 - OEIS

A209023

T(n,k)=Number of nXk 1..5 arrays with every element value z a city block distance of exactly z from another element value z

0, 1, 1, 1, 2, 1, 3, 16, 16, 3, 3, 152, 488, 152, 3, 16, 1721, 26029, 26029, 1721, 16, 21, 21083, 1745235, 7562979, 1745235, 21083, 21, 71, 217825, 116464240

(list; table; graph; refs; listen; history; text; internal format)

OFFSET

1,5

COMMENTS

Table starts

..0.....1.......1.......3.......3........16.....21.71

..1.....2......16.....152....1721.....21083.217825

..1....16.....488...26029.1745235.116464240

..3...152...26029.7562979

..3..1721.1745235

.16.21083

.21

LINKS

Table of n, a(n) for n=1..31.

EXAMPLE

Some solutions for n=3 k=4

..1..1..3..2....4..3..1..1....4..2..1..1....5..2..4..2....3..2..3..3

..3..3..2..3....2..1..2..1....4..1..1..4....2..1..1..3....3..2..3..3

..3..2..3..3....3..1..4..2....4..2..4..4....4..3..1..5....2..2..3..2

CROSSREFS

Sequence in context: A283748 A209365 A209394 * A209058 A209215 A000618

Adjacent sequences: A209020 A209021 A209022 * A209024 A209025 A209026

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Mar 04 2012

STATUS

approved