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A252574 T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 1 2 5 6 or 7 and every 3X3 column and antidiagonal sum not equal to 1 2 5 6 or 7 16

%I #4 Dec 18 2014 10:32:49

%S 702,843,742,1069,868,890,1694,1795,1558,1469,2985,3441,4168,3286,

%T 2637,5401,8980,9051,10885,7610,4583,9936,23007,30532,25882,34532,

%U 17261,8279,18972,47737,92725,107651,88844,96099,39419,15476,36144,133142,208375

%N T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 1 2 5 6 or 7 and every 3X3 column and antidiagonal sum not equal to 1 2 5 6 or 7

%C Table starts

%C ...702....843....1069.....1694......2985.......5401........9936........18972

%C ...742....868....1795.....3441......8980......23007.......47737.......133142

%C ...890...1558....4168.....9051.....30532......92725......208375.......715437

%C ..1469...3286...10885....25882....107651.....395500......959944......4006901

%C ..2637...7610...34532....88844....498696....2538669.....6590930.....37656158

%C ..4583..17261...96099...263046...1887578...11285381....31059674....225598956

%C ..8279..39419..275252...802760...7115253...53055996...155864925...1380518004

%C .15476..94224..896803..2655311..31894631..337833222...994640586..12185963853

%C .28007.218717.2561903..7860183.122743127.1537313257..4728064653..74805119002

%C .51488.504824.7521424.24273030.470091119.7468646942.24277561799.469290271873

%H R. H. Hardin, <a href="/A252574/b252574.txt">Table of n, a(n) for n = 1..392</a>

%F Empirical for column k:

%F k=1: [linear recurrence of order 54] for n>60

%F k=2: [order 45] for n>50

%F k=3: [order 39] for n>46

%F k=4: [order 54] for n>60

%F k=5: [order 84] for n>89

%F Empirical for row n:

%F n=1: [linear recurrence of order 33] for n>43

%F n=2: [order 27] for n>34

%F n=3: [order 24] for n>32

%F n=4: [order 24] for n>31

%F n=5: [order 24] for n>32

%F n=6: [order 42] for n>50

%F n=7: [order 36] for n>45

%e Some solutions for n=4 k=4

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

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

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

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

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

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

%Y Column 1 is A005010(n-1)

%Y Column 2 is A052548(n+3)

%Y Row 1 is A083706(n+1)

%K nonn,tabl

%O 1,1

%A _R. H. Hardin_, Dec 18 2014

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Last modified March 28 18:04 EDT 2024. Contains 371254 sequences. (Running on oeis4.)