A276245 Number of nX5 0..2 arrays with no element equal to any value at offset (-2,-1) (-1,1) or (0,-2) and new values introduced in order 0..2.

12, 216, 900, 6372, 43662, 291113, 2003694, 13727745, 93489265, 640009243, 4379295051, 29922848497, 204644541144, 1399625354348, 9569139510819, 65434111682248, 447456959717215, 3059585696910093, 20921152908833326

Offset: 1

Author

R. H. Hardin, Aug 25 2016

Keywords

• nonn

Comments

Column 5 of A276248.

Examples

			Some solutions for n=4
..0..0..1..1..0. .0..0..1..2..0. .0..1..1..0..0. .0..1..2..0..0
..2..0..0..2..2. .2..2..0..1..1. .0..0..2..2..0. .0..0..1..1..2
..2..1..1..0..2. .0..1..2..2..0. .2..1..0..2..2. .1..2..0..0..2
..0..0..2..1..0. .2..0..0..1..2. .2..1..1..0..0. .1..2..2..0..0
		

Links

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

Crossrefs

Cf. A276248.

Formula

Empirical: a(n) = 9*a(n-1) -15*a(n-2) +193*a(n-3) -1673*a(n-4) +2361*a(n-5) -13142*a(n-6) +119938*a(n-7) -153895*a(n-8) +427606*a(n-9) -4363581*a(n-10) +5536053*a(n-11) -7687709*a(n-12) [phone]*a(n-13) -118267531*a(n-14) [phone]*a(n-15) -1111701314*a(n-16) [phone]*a(n-17) -578797811*a(n-18) [phone]*a(n-19) -12402279754*a(n-20) [phone]*a(n-21) -39106130132*a(n-22) [phone]*a(n-23) -6751787454*a(n-24) [phone]*a(n-25) -184309560828*a(n-26) [phone]*a(n-27) -147643128228*a(n-28) [phone]*a(n-29) -1551938012*a(n-30) [phone]*a(n-31) -274843851584*a(n-32) -4525044880*a(n-33) [phone]*a(n-34) [phone]*a(n-35) [phone]*a(n-36) -39509856000*a(n-37) [phone]*a(n-38) [phone]*a(n-39) -118431744*a(n-40) -1064960*a(n-41) for n>45