A209055 Number of nX1 1..6 arrays with every element value z a city block distance of exactly z from another element value z

0, 1, 1, 3, 3, 16, 24, 98, 161, 515, 956, 2641, 5686, 14869, 33986, 84574, 196092, 474284, 1110888, 2665506, 6280574, 15027417, 35701279, 85266546, 202157753, 480306818, 1140496671, 2711160051, 6442522473, 15326524978, 36425732326

Offset

1,4

Comments

Column 1 of A209058

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

Some solutions for n=7
..6....3....4....6....1....3....2....1....5....2....3....1....2....1....1....5
..4....4....1....1....1....4....2....1....1....2....3....1....4....1....1....5
..1....2....1....1....1....2....2....2....1....2....3....1....2....4....1....1
..1....3....1....1....2....3....2....2....1....2....3....3....3....1....1....1
..1....2....4....1....2....2....2....2....2....1....3....1....2....1....1....1
..4....4....1....1....2....4....1....2....5....1....3....1....4....1....1....5
..6....2....1....6....2....3....1....2....2....1....3....3....3....4....1....5

Crossrefs

Sequence in context: A209020 A258204 A258017 * A209212 A222847 A278309

Adjacent sequences: A209052 A209053 A209054 * A209056 A209057 A209058

Keyword

nonn

Author

R. H. Hardin Mar 04 2012

Status

approved