The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A278152 Number of nX3 0..1 arrays with every element both equal and not equal to some elements at offset (-1,-1) (-1,0) (-1,1) (0,-1) (0,1) (1,-1) or (1,0), with upper left element zero. 1
 0, 7, 42, 268, 1759, 11675, 77102, 509336, 3365082, 22232537, 146885095, 970436014, 6411449580, 42358984701, 279856142429, 1848945655959, 12215561936959, 80705429566515, 533202352449825, 3522746241343707, 23273980363926953 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Column 3 of A278157. LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 6*a(n-1) +5*a(n-2) -5*a(n-3) -4*a(n-4) -38*a(n-5) -25*a(n-6) +26*a(n-7) +3*a(n-8) +14*a(n-9) +19*a(n-10) -3*a(n-11) +3*a(n-12) -a(n-13) -a(n-14) for n>15 EXAMPLE Some solutions for n=4 ..0..1..0. .0..0..1. .0..0..1. .0..1..1. .0..1..1. .0..0..0. .0..0..1 ..0..1..0. .1..1..0. .1..1..1. .0..1..0. .0..1..0. .1..1..0. .1..1..0 ..1..1..0. .1..0..1. .0..0..1. .0..0..1. .1..0..1. .1..0..1. .0..1..0 ..0..0..1. .0..0..1. .0..1..0. .0..1..1. .1..0..1. .1..1..1. .0..0..1 CROSSREFS Cf. A278157. Sequence in context: A152240 A221794 A187246 * A332082 A271427 A073506 Adjacent sequences:  A278149 A278150 A278151 * A278153 A278154 A278155 KEYWORD nonn AUTHOR R. H. Hardin, Nov 13 2016 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified January 28 15:20 EST 2022. Contains 350657 sequences. (Running on oeis4.)