A275501 Number of nX5 0..2 arrays with no element equal to any value at offset (-2,-1) (-2,0) or (-1,-1) and new values introduced in order 0..2.

41, 1944, 2000, 3168, 4180, 13384, 43780, 143784, 470352, 1549756, 5114352, 16851668, 55718276, 183999596, 607959912, 2009783684, 6640967048, 21951863104, 72556631720, 239811612380, 792682822452, 2620034132264, 8660100023060

Offset: 1

Author

R. H. Hardin, Jul 30 2016

Keywords

• nonn

Comments

Column 5 of A275504.

Examples

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

Links

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

Crossrefs

Cf. A275504.

Formula

Empirical: a(n) = a(n-1) +16*a(n-2) -120*a(n-4) -55*a(n-5) +549*a(n-6) +319*a(n-7) -1772*a(n-8) -891*a(n-9) +4300*a(n-10) +1407*a(n-11) -7992*a(n-12) -1155*a(n-13) +11470*a(n-14) +a(n-15) -12854*a(n-16) +1155*a(n-17) +11372*a(n-18) -1407*a(n-19) -7960*a(n-20) +891*a(n-21) +4357*a(n-22) -320*a(n-23) -1820*a(n-24) +55*a(n-25) +560*a(n-26) -120*a(n-28) -a(n-29) +16*a(n-30) -a(n-32) for n>36