A230183 Number of nX7 0..2 arrays x(i,j) with each element horizontally or antidiagonally next to at least one element with value 2-x(i,j)

63, 23307, 7957785, 2770525761, 967087903539, 337613109419463, 117863748242661711, 41147363351637663933, 14364941208682152185085, 5014939538324891181282729, 1750763768994816766061338911

Offset

1,1

Comments

Column 7 of A230184

Links

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

Formula

Empirical: a(n) = 423*a(n-1) -27574*a(n-2) +635482*a(n-3) -5134400*a(n-4) -1057942*a(n-5) +359390009*a(n-6) -2276133921*a(n-7) -4786697871*a(n-8) +43147871701*a(n-9) -58891282049*a(n-10) +295853081461*a(n-11) -19477795872*a(n-12) -15063958346018*a(n-13) -12707776242978*a(n-14) +31292351839698*a(n-15) +53749073622274*a(n-16) +115892033432538*a(n-17) +123584415908474*a(n-18) +63131758719268*a(n-19) +3552845497892*a(n-20) -120072286442478*a(n-21) -399472984091713*a(n-22) -449835821914753*a(n-23) -141278242519618*a(n-24) +155121134950412*a(n-25) +179495113156895*a(n-26) +77538390418085*a(n-27) +14620397554916*a(n-28) +328715123244*a(n-29) +43801420272*a(n-30) -2654978352*a(n-31) +211558464*a(n-32) +531194112*a(n-33) +14929920*a(n-34) for n>37

Example

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

Crossrefs

Sequence in context: A183482 A327416 A001238 * A183552 A210824 A110852

Adjacent sequences: A230180 A230181 A230182 * A230184 A230185 A230186

Keyword

nonn

Author

R. H. Hardin, Oct 11 2013

Status

approved