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A184236 Number of strings of numbers x(i=1..n) in 0..5 with sum i^2*x(i)^2 equal to n^2*25 1

%I #5 Mar 31 2012 12:35:58

%S 1,1,1,2,15,24,213,356,2531,9710,46519,244683,891784,4720805,16462599,

%T 78516038,276022161,1161269082,4197268616,15926278724,58682897472,

%U 207708273846,766346150693,2617679503224,9515642240343,32088717865889

%N Number of strings of numbers x(i=1..n) in 0..5 with sum i^2*x(i)^2 equal to n^2*25

%C Column 5 of A184240

%H R. H. Hardin, <a href="/A184236/b184236.txt">Table of n, a(n) for n = 1..33</a>

%e Some solutions for n=7

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

%e ..1....1....0....2....4....2....3....3....1....1....1....5....5....5....2....2

%e ..2....4....4....3....4....3....4....4....0....0....0....4....5....5....1....0

%e ..2....1....2....4....2....1....1....1....5....4....4....5....0....3....5....0

%e ..2....3....0....2....1....0....4....2....0....5....0....2....2....4....0....2

%e ..4....1....4....4....2....3....4....2....1....2....5....1....0....2....0....3

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

%K nonn

%O 1,4

%A _R. H. Hardin_ Jan 10 2011

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Last modified March 28 10:55 EDT 2024. Contains 371241 sequences. (Running on oeis4.)