A251430 Number of length 3+2 0..n arrays with the sum of the maximum minus twice the median plus the minimum of adjacent triples multiplied by some arrangement of +-1 equal to zero.

12, 97, 380, 1113, 2532, 5097, 9120, 15449, 24344, 36877, 53400, 75541, 103332, 138857, 182012, 235645, 299348, 376229, 465720, 572073, 693956, 836041, 996988, 1182653, 1390604, 1627337, 1890212, 2187213, 2514672, 2880669, 3281476, 3727513

Offset: 1

Author

R. H. Hardin, Dec 02 2014

Keywords

• nonn

Comments

Row 3 of A251428

Examples

			Some solutions for n=10
.10....6....6....1...10....6...10....6....6....8....0....5....6....2....1....8
..4....8....7....0....6....2....6....4....5....4....8....9...10....6....5....6
..6....5....9....1....7....5....6....7....2....5....5....1....3....5....4....8
.10....9....7....9....0....4....4....9....3....2...10....2....9....9....2....4
..2....4...10....2....5....0...10....8....2....5....3....9....4....9....9....7
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210

Formula

Empirical: a(n) = -2*a(n-1) -4*a(n-2) -5*a(n-3) -5*a(n-4) -2*a(n-5) +3*a(n-6) +10*a(n-7) +17*a(n-8) +21*a(n-9) +21*a(n-10) +14*a(n-11) +3*a(n-12) -13*a(n-13) -27*a(n-14) -38*a(n-15) -40*a(n-16) -34*a(n-17) -19*a(n-18) +19*a(n-20) +34*a(n-21) +40*a(n-22) +38*a(n-23) +27*a(n-24) +13*a(n-25) -3*a(n-26) -14*a(n-27) -21*a(n-28) -21*a(n-29) -17*a(n-30) -10*a(n-31) -3*a(n-32) +2*a(n-33) +5*a(n-34) +5*a(n-35) +4*a(n-36) +2*a(n-37) +a(n-38)