A232139 Number of (2+1)X(n+1) 0..2 arrays with no element equal to a strict majority of its horizontal and antidiagonal neighbors, with values 0..2 introduced in row major order.

44, 728, 10956, 169692, 2616952, 40399768, 623543776, 9624373808, 148550587192, 2292857494812, 35389922134468, 546238342870352, 8431109896279836, 130132963416612180, 2008583492065392256, 31002196055330559468

Offset: 1

Author

R. H. Hardin, Nov 19 2013

Keywords

• nonn

Comments

Row 2 of A232137

Examples

			Some solutions for n=3
..0..1..0..1....0..1..1..2....0..1..2..2....0..1..2..2....0..1..0..2
..1..2..1..2....0..0..2..2....2..1..0..2....0..1..0..2....1..0..0..2
..1..0..1..2....2..0..0..1....2..2..0..1....1..2..0..1....2..1..2..0
		

Links

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

Formula

Empirical: a(n) = 15*a(n-1) +16*a(n-2) -163*a(n-3) +305*a(n-4) +116*a(n-5) -2324*a(n-6) +1718*a(n-7) -5922*a(n-8) +14296*a(n-9) +18892*a(n-10) -15292*a(n-11) -21000*a(n-12) -12320*a(n-13) -17184*a(n-14) +11072*a(n-15) +5120*a(n-17)