A238066 - OEIS

A238066

Number of (n+1)X(2+1) 0..3 arrays with the maximum minus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one

1644, 16116, 157404, 1499348, 14168952, 135441648, 1301417096, 12431472388, 118450899788, 1132038063428, 10831946031928, 103486462462004, 988122548790540, 9442336803062972, 90254123138029500, 862343664665398200

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OFFSET

1,1

COMMENTS

Column 2 of A238072

LINKS

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

FORMULA

Empirical: a(n) = 16*a(n-2) +245*a(n-3) +3175*a(n-4) +11026*a(n-5) +14790*a(n-6) +30547*a(n-7) +66976*a(n-8) -4677*a(n-9) -94176*a(n-10) -54207*a(n-11) -285131*a(n-12) -299281*a(n-13) +431751*a(n-14) +567877*a(n-15) -34526*a(n-16) -198712*a(n-17) -48032*a(n-18) +10752*a(n-19) +9216*a(n-20) for n>24

EXAMPLE

Some solutions for n=3

..2..0..3....2..3..3....1..2..1....2..1..0....1..2..2....0..3..2....2..1..2

..1..1..3....0..2..1....2..2..3....0..1..3....0..2..3....2..1..3....1..1..0

..1..2..3....1..1..2....2..2..2....1..3..3....3..1..2....0..0..2....1..3..1

..0..2..0....0..1..0....3..2..2....3..3..2....2..2..2....1..1..0....0..2..1

CROSSREFS

Sequence in context: A272127 A252197 A135016 * A349178 A247077 A093059

Adjacent sequences: A238063 A238064 A238065 * A238067 A238068 A238069

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 17 2014

STATUS

approved