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A184238 Number of strings of numbers x(i=1..n) in 0..7 with sum i^2*x(i)^2 equal to n^2*49 1

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

%S 1,1,1,2,30,47,706,2108,19178,97714,592976,4314051,20748316,146773816,

%T 682184037,4255325221,20091607500,109644051939,531805180789,

%U 2616813468267,12881990830635,59476915385038,291195760216883

%N Number of strings of numbers x(i=1..n) in 0..7 with sum i^2*x(i)^2 equal to n^2*49

%C Column 7 of A184240

%H R. H. Hardin, <a href="/A184238/b184238.txt">Table of n, a(n) for n = 1..24</a>

%e Some solutions for n=5

%e ..0....4....6....6....1....1....2....4....2....6....6....1....4....0....0....2

%e ..5....7....0....3....0....3....7....2....2....4....6....2....1....5....3....7

%e ..5....6....5....4....6....4....4....1....6....6....2....6....6....3....5....5

%e ..0....2....2....7....0....3....4....7....4....6....7....7....4....3....2....5

%e ..6....5....6....3....6....6....5....4....5....3....3....2....5....6....6....4

%K nonn

%O 1,4

%A _R. H. Hardin_ Jan 10 2011

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Last modified March 28 09:04 EDT 2024. Contains 371240 sequences. (Running on oeis4.)