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A205070 Number of (n+1)X7 0..1 arrays with the number of rightwards and downwards edge increases in each 2X2 subblock differing from the number in all its horizontal and vertical neighbors 1
1432, 386, 524, 784, 1232, 1984, 2752, 3936, 5728, 8288, 12160, 17872, 26240, 38512, 56480, 82744, 121280, 177648, 260448, 381528, 559488, 819728, 1201888, 1761224, 2581728, 3783824, 5545600, 8129368, 11912032, 17465728, 25586784, 37524656 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A205072

LINKS

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

FORMULA

Empirical: a(n) = 3*a(n-2) -2*a(n-6) -3*a(n-8) -3*a(n-10) -2*a(n-12) +a(n-14) +2*a(n-16) +9*a(n-18) +14*a(n-20) +17*a(n-22) +18*a(n-24) +17*a(n-26) +15*a(n-28) +10*a(n-30) +6*a(n-32) +3*a(n-34) +a(n-36) for n>41

EXAMPLE

Some solutions for n=4

..0..1..0..0..0..1..0....1..1..0..0..0..1..0....0..1..0..0..0..1..0

..0..1..1..1..0..1..1....1..1..1..1..0..1..1....1..1..1..1..0..1..1

..0..0..0..1..0..0..0....0..1..0..1..0..0..0....0..1..0..1..0..0..0

..1..1..0..1..1..1..0....0..1..1..1..1..1..0....0..1..1..1..1..1..0

..0..1..0..0..0..1..0....0..0..0..1..0..1..0....0..0..0..1..0..1..0

CROSSREFS

Sequence in context: A147695 A151996 A208628 * A169822 A114083 A143475

Adjacent sequences:  A205067 A205068 A205069 * A205071 A205072 A205073

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 21 2012

STATUS

approved

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Last modified April 18 19:16 EDT 2021. Contains 343089 sequences. (Running on oeis4.)