A221321 - OEIS

A221321

T(n,k)=Number of nonnegative integer arrays of length n summing to n without equal adjacent values modulo k

1, 1, 0, 1, 0, 0, 1, 2, 3, 0, 1, 2, 6, 8, 0, 1, 2, 7, 8, 5, 0, 1, 2, 7, 14, 19, 0, 0, 1, 2, 7, 14, 28, 44, 28, 0, 1, 2, 7, 14, 30, 66, 84, 72, 0, 1, 2, 7, 14, 30, 76, 168, 212, 45, 0, 1, 2, 7, 14, 30, 76, 185, 378, 474, 0, 0, 1, 2, 7, 14, 30, 76, 188, 430, 866, 1008, 286, 0, 1, 2, 7, 14, 30, 76

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

OFFSET

1,8

COMMENTS

Table starts

.1...1....1.....1.....1.....1.....1.....1.....1.....1.....1.....1.....1.....1

.0...0....2.....2.....2.....2.....2.....2.....2.....2.....2.....2.....2.....2

.0...3....6.....7.....7.....7.....7.....7.....7.....7.....7.....7.....7.....7

.0...8....8....14....14....14....14....14....14....14....14....14....14....14

.0...5...19....28....30....30....30....30....30....30....30....30....30....30

.0...0...44....66....76....76....76....76....76....76....76....76....76....76

.0..28...84...168...185...188...188...188...188...188...188...188...188...188

.0..72..212...378...430...444...444...444...444...444...444...444...444...444

.0..45..474...866..1044..1071..1075..1075..1075..1075..1075..1075..1075..1075

.0...0.1008..2128..2544..2638..2656..2656..2656..2656..2656..2656..2656..2656

.0.286.2438..5065..6154..6460..6499..6504..6504..6504..6504..6504..6504..6504

.0.728.5436.12000.15002.15756.15904.15926.15926.15926.15926.15926.15926.15926

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..2347

EXAMPLE

Some solutions for n=7 k=4

..1....0....0....0....0....3....1....0....2....0....0....0....1....3....0....2

..2....1....1....3....1....0....2....3....0....3....1....1....0....1....1....1

..0....0....0....0....0....1....1....0....1....1....0....0....3....0....0....0

..1....2....3....1....1....0....0....2....0....0....1....1....1....2....1....3

..2....3....0....2....2....1....1....1....3....1....4....0....0....0....0....0

..1....1....2....1....0....0....2....0....0....2....1....5....2....1....1....1

..0....0....1....0....3....2....0....1....1....0....0....0....0....0....4....0

CROSSREFS

Diagonal is A221235 for n>3

Sequence in context: A360302 A351939 A170899 * A367959 A179392 A106730

Adjacent sequences: A221318 A221319 A221320 * A221322 A221323 A221324

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Jan 10 2013

STATUS

approved