cp's OEIS Frontend

A213803 Number of 5 X 5 0..n symmetric arrays with all rows summing to floor(n*5/2).

%I A213803 #6 Apr 18 2023 14:49:34
%S A213803 112,5673,87932,815263,4843626,22698959,84662388,275879169,782758404,
%T A213803 2036181209,4827542558,10773876919,22498928491,44939366943,
%U A213803 85390966217,156814686053,276999175867,476278194021,793826178700,1294496520831
%N A213803 Number of 5 X 5 0..n symmetric arrays with all rows summing to floor(n*5/2).
%C A213803 Row 5 of A213800.
%H A213803 R. H. Hardin, <a href="/A213803/b213803.txt">Table of n, a(n) for n = 1..23</a>
%e A213803 Some solutions for n=4
%e A213803 ..0..0..2..4..4....1..4..0..4..1....1..1..0..4..4....0..3..4..0..3
%e A213803 ..0..0..4..2..4....4..4..0..1..1....1..3..1..1..4....3..2..2..1..2
%e A213803 ..2..4..1..2..1....0..0..3..3..4....0..1..3..4..2....4..2..2..1..1
%e A213803 ..4..2..2..1..1....4..1..3..1..1....4..1..4..1..0....0..1..1..4..4
%e A213803 ..4..4..1..1..0....1..1..4..1..3....4..4..2..0..0....3..2..1..4..0
%Y A213803 Cf. A213800.
%K A213803 nonn
%O A213803 1,1
%A A213803 _R. H. Hardin_, Jun 20 2012