A209610 T(n,k)=Number of nXk 1..2 arrays with every element value z a city block distance of exactly z from another element value z

0, 1, 1, 1, 2, 1, 2, 11, 11, 2, 2, 45, 125, 45, 2, 4, 170, 955, 955, 170, 4, 6, 538, 6218, 11879, 6218, 538, 6, 9, 1674, 39667, 151736, 151736, 39667, 1674, 9, 13, 5410, 260861, 1947347, 3833954, 1947347, 260861, 5410, 13, 19, 18001, 1735169, 24912066

Offset

1,5

Comments

Table starts

.0....1.......1.........2...........2..............4................6

.1....2......11........45.........170............538.............1674

.1...11.....125.......955........6218..........39667...........260861

.2...45.....955.....11879......151736........1947347.........24912066

.2..170....6218....151736.....3833954.......95442732.......2375975754

.4..538...39667...1947347....95442732.....4623938410.....223164388883

.6.1674..260861..24912066..2375975754...223164388883...20901164219657

.9.5410.1735169.322047969.59592537600.10856162934984.1975174382937912

Links

R. H. Hardin, Table of n, a(n) for n = 1..180

Example

Some solutions for n=3 k=3
..2..2..2....2..2..2....1..2..2....1..1..1....2..2..2....1..2..1....2..2..2
..1..1..2....2..1..2....1..2..2....1..2..2....2..2..2....1..1..1....1..2..1
..1..1..1....1..1..1....1..1..1....2..2..2....1..1..1....2..2..2....1..2..1

Crossrefs

Sequence in context: A069238 A248977 A266655 * A324058 A165313 A364074

Adjacent sequences: A209607 A209608 A209609 * A209611 A209612 A209613

Keyword

nonn,tabl

Author

R. H. Hardin Mar 10 2012

Status

approved