A219413 Unmatched value maps: number of 4Xn binary arrays indicating the locations of corresponding elements not equal to any horizontal or antidiagonal neighbor in a random 0..2 4Xn array.

1, 65, 1180, 14737, 193116, 2633596, 35794147, 484744488, 6565497170, 88948580449, 1205066512034, 16325845207244, 221177055650826, 2996434981248536, 40594730646344051, 549964241638455480

Offset: 1

Author

R. H. Hardin Nov 19 2012

Keywords

• nonn

Comments

Row 4 of A219410

Examples

			Some solutions for n=3
..0..0..1....0..0..0....0..0..1....0..0..1....0..0..1....0..0..0....0..0..1
..0..1..1....1..0..1....0..1..1....0..0..1....0..0..0....0..0..0....1..1..0
..0..0..0....0..1..1....1..1..0....1..1..0....1..0..0....1..0..0....0..0..1
..1..0..1....0..0..0....1..0..1....1..0..1....1..0..0....0..0..0....1..1..1
		

Links

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

Formula

Empirical: a(n) = 16*a(n-1) -65*a(n-2) +488*a(n-3) -1151*a(n-4) +5482*a(n-5) -7699*a(n-6) +23952*a(n-7) -11275*a(n-8) +4326*a(n-9) +78090*a(n-10) -207624*a(n-11) -138747*a(n-12) +498504*a(n-13) +170692*a(n-14) -650696*a(n-15) -185632*a(n-16) +542208*a(n-17) +117248*a(n-18) -278528*a(n-19) -32768*a(n-20) +65536*a(n-21)