login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A221321 T(n,k)=Number of nonnegative integer arrays of length n summing to n without equal adjacent values modulo k 7

%I #4 Jan 10 2013 19:41:30

%S 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,

%T 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,

%U 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

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

%C Table starts

%C .1...1....1.....1.....1.....1.....1.....1.....1.....1.....1.....1.....1.....1

%C .0...0....2.....2.....2.....2.....2.....2.....2.....2.....2.....2.....2.....2

%C .0...3....6.....7.....7.....7.....7.....7.....7.....7.....7.....7.....7.....7

%C .0...8....8....14....14....14....14....14....14....14....14....14....14....14

%C .0...5...19....28....30....30....30....30....30....30....30....30....30....30

%C .0...0...44....66....76....76....76....76....76....76....76....76....76....76

%C .0..28...84...168...185...188...188...188...188...188...188...188...188...188

%C .0..72..212...378...430...444...444...444...444...444...444...444...444...444

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

%C .0...0.1008..2128..2544..2638..2656..2656..2656..2656..2656..2656..2656..2656

%C .0.286.2438..5065..6154..6460..6499..6504..6504..6504..6504..6504..6504..6504

%C .0.728.5436.12000.15002.15756.15904.15926.15926.15926.15926.15926.15926.15926

%H R. H. Hardin, <a href="/A221321/b221321.txt">Table of n, a(n) for n = 1..2347</a>

%e Some solutions for n=7 k=4

%e ..1....0....0....0....0....3....1....0....2....0....0....0....1....3....0....2

%e ..2....1....1....3....1....0....2....3....0....3....1....1....0....1....1....1

%e ..0....0....0....0....0....1....1....0....1....1....0....0....3....0....0....0

%e ..1....2....3....1....1....0....0....2....0....0....1....1....1....2....1....3

%e ..2....3....0....2....2....1....1....1....3....1....4....0....0....0....0....0

%e ..1....1....2....1....0....0....2....0....0....2....1....5....2....1....1....1

%e ..0....0....1....0....3....2....0....1....1....0....0....0....0....0....4....0

%Y Diagonal is A221235 for n>3

%K nonn,tabl

%O 1,8

%A _R. H. Hardin_ Jan 10 2013

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified August 31 22:14 EDT 2024. Contains 375574 sequences. (Running on oeis4.)