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A185498 Number of (n+1)X2 0..2 arrays with every 2X2 subblock diagonal sum less antidiagonal sum equal to some horizontal or vertical neighbor 2X2 subblock diagonal sum less antidiagonal sum 1
0, 99, 163, 1107, 2887, 13347, 43105, 174081, 613897, 2364597, 8617105, 32495955, 119862859, 448215555, 1661092927, 6192979083, 23001089833, 85659616761, 318444543841, 1185407345757, 4408595984617, 16407725447979, 61033569059827 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Column 1 of A185504
LINKS
FORMULA
Empirical: a(n)=6*a(n-1)-2*a(n-2)-48*a(n-3)+132*a(n-4)-201*a(n-5)+234*a(n-6)+6*a(n-7)-2052*a(n-8)+5616*a(n-9)-10656*a(n-10)+8640*a(n-11)-5184*a(n-12)
EXAMPLE
Some solutions for 3X2
..0..2....1..1....1..0....0..0....1..0....2..0....1..2....0..1....0..0....0..1
..0..0....1..0....2..1....1..1....2..2....2..1....0..1....0..1....0..0....1..1
..2..0....2..0....2..1....0..0....1..2....0..0....0..1....1..2....1..1....1..0
CROSSREFS
Sequence in context: A095420 A064112 A325881 * A126230 A055164 A075815
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 29 2011
STATUS
approved

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Last modified March 28 15:38 EDT 2024. Contains 371254 sequences. (Running on oeis4.)