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A247406 Number of length 2+4 0..n arrays with no disjoint pairs in any consecutive five terms having the same sum 1

%I #4 Sep 16 2014 08:09:11

%S 0,40,264,1544,6216,19080,49032,113896,237456,466640,856512,1494696,

%T 2491584,4009888,6231576,9423824,13882728,20009088,28250184,39194656,

%U 53468496,71900744,95363904,124954128,161852112,207511288,263443896

%N Number of length 2+4 0..n arrays with no disjoint pairs in any consecutive five terms having the same sum

%C Row 2 of A247404

%H R. H. Hardin, <a href="/A247406/b247406.txt">Table of n, a(n) for n = 1..95</a>

%F Empirical: a(n) = a(n-1) +a(n-3) +a(n-4) -a(n-5) -2*a(n-7) -a(n-8) -a(n-9) +a(n-11) +3*a(n-12) +a(n-13) +2*a(n-14) -2*a(n-16) -a(n-17) -3*a(n-18) -a(n-19) +a(n-21) +a(n-22) +2*a(n-23) +a(n-25) -a(n-26) -a(n-27) -a(n-29) +a(n-30)

%e Some solutions for n=6

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

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

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

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

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

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

%K nonn

%O 1,2

%A _R. H. Hardin_, Sep 16 2014

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Last modified March 4 10:39 EST 2024. Contains 370528 sequences. (Running on oeis4.)