A237231 Number of (n+1)X(5+1) 0..2 arrays with the maximum plus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one

9628, 36180, 97862, 233536, 721854, 1737372, 5299502, 12992080, 40059070, 97555340, 300177654, 731229928, 2240228750, 5478702380, 16794581906, 41072728888, 125888770174, 307837473900, 942852920590, 2306978778432

Offset

1,1

Comments

Column 5 of A237234

Links

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

Formula

Empirical: a(n) = 7*a(n-2) +10*a(n-4) +15*a(n-6) -314*a(n-8) -1389*a(n-10) +1365*a(n-12) +3415*a(n-14) +2472*a(n-16) +2424*a(n-18) +3384*a(n-20) -6192*a(n-22) +1152*a(n-24) -2304*a(n-26) for n>29

Example

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

Crossrefs

Sequence in context: A253520 A254418 A254425 * A031627 A252128 A237674

Adjacent sequences: A237228 A237229 A237230 * A237232 A237233 A237234

Keyword

nonn

Author

R. H. Hardin, Feb 05 2014

Status

approved