|
%I #3 Nov 18 2014 05:41:31
%S 13,117,233,1773,8767,57833,363457,2317841,14305925,85334033,
%T 487200669,2669191565,14140938607
%N Number of length n+2 0..4 arrays with the sum of second differences squared multiplied by some arrangement of +-1 equal to zero
%C Column 4 of A250320
%e Some solutions for n=6
%e ..4....3....2....2....2....3....4....2....2....3....1....3....3....3....3....3
%e ..0....1....3....2....3....2....0....0....0....1....3....2....4....0....2....4
%e ..1....0....0....4....4....0....0....3....3....3....4....1....1....0....0....0
%e ..4....3....0....2....3....4....3....2....1....4....3....1....0....1....4....1
%e ..2....4....3....3....4....3....3....2....1....2....3....3....1....1....3....0
%e ..4....4....2....4....3....1....4....4....4....3....4....3....1....3....0....4
%e ..0....2....2....0....2....3....4....4....4....4....2....0....4....2....1....3
%e ..0....4....1....2....3....0....4....4....2....4....4....1....3....3....2....4
%K nonn
%O 1,1
%A _R. H. Hardin_, Nov 18 2014
| 