login

Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.

Number of length n+3 0..7 arrays with some disjoint pairs in every consecutive four terms having the same sum
1

%I #4 Sep 18 2014 14:03:00

%S 848,1616,3220,6584,13668,29012,62108,133716,288996,627654,1366118,

%T 2978172,6500008,14206554,31071490,67992670,148845278,325994076,

%U 714155690,1564780972,3429103460,7515830880,16474726804,36114808462

%N Number of length n+3 0..7 arrays with some disjoint pairs in every consecutive four terms having the same sum

%C Column 7 of A247533

%H R. H. Hardin, <a href="/A247532/b247532.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=6

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

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

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

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

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Sep 18 2014