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A219217 T(n,k)=Number of nXk arrays of the minimum value of corresponding elements and their horizontal, vertical, diagonal or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and columns, 0..2 nXk array 8

%I #4 Nov 14 2012 21:58:17

%S 3,3,3,6,3,6,10,7,7,10,15,12,37,12,15,21,21,113,113,21,21,28,35,345,

%T 493,345,35,28,36,57,955,2391,2391,955,57,36,45,91,2508,10287,19307,

%U 10287,2508,91,45,55,142,6303,42301,131724,131724,42301,6303,142,55,66,216

%N T(n,k)=Number of nXk arrays of the minimum value of corresponding elements and their horizontal, vertical, diagonal or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and columns, 0..2 nXk array

%C Table starts

%C ..3...3......6.......10........15..........21..........28..........36

%C ..3...3......7.......12........21..........35..........57..........91

%C ..6...7.....37......113.......345.........955........2508........6303

%C .10..12....113......493......2391.......10287.......42301......165593

%C .15..21....345.....2391.....19307......131724......854611.....5244065

%C .21..35....955....10287....131724.....1401275....14175675...136413948

%C .28..57...2508....42301....854611....14175675...225464479..3456415362

%C .36..91...6303...165593...5244065...136413948..3456415362.85975478510

%C .45.142..15251...623267..31109196..1283062154.52566495532

%C .55.216..35567..2251824.177926081.11695541948

%C .66.320..80116..7816033.979705264

%C .78.462.174791.26126804

%H R. H. Hardin, <a href="/A219217/b219217.txt">Table of n, a(n) for n = 1..127</a>

%e Some solutions for n=3 k=4

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

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

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

%Y Column 1 is (n^2+n)/2 for n>1

%K nonn,tabl

%O 1,1

%A _R. H. Hardin_ Nov 14 2012

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Last modified April 25 16:45 EDT 2024. Contains 371989 sequences. (Running on oeis4.)