This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A202901 Number of nX3 0..1 arrays with every one equal to some NW, E or S neighbor 1
 1, 14, 93, 494, 2801, 16062, 91161, 517646, 2942681, 16724094, 95039817, 540117614, 3069530009, 17444277726, 99136698537, 563399082830, 3201826086713, 18196142535870, 103409617841865, 587682198231086, 3339828270813785 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Column 3 of A202906 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 8*a(n-1) -17*a(n-2) +32*a(n-3) -70*a(n-4) +72*a(n-5) -24*a(n-6) EXAMPLE Some solutions for n=5 ..0..0..1....0..0..0....0..0..1....0..1..0....0..0..0....0..1..1....1..0..0 ..1..0..1....0..1..1....1..1..1....0..1..1....1..1..0....0..0..1....1..1..0 ..1..1..1....1..1..1....1..0..1....0..1..1....1..1..1....1..1..1....1..1..1 ..1..1..1....0..1..0....1..1..0....0..1..1....0..1..1....1..1..1....1..1..1 ..0..1..0....0..0..1....0..1..1....0..0..1....0..1..1....1..1..1....0..0..0 CROSSREFS Sequence in context: A022609 A060217 A113776 * A224328 A241396 A101383 Adjacent sequences:  A202898 A202899 A202900 * A202902 A202903 A202904 KEYWORD nonn AUTHOR R. H. Hardin Dec 25 2011 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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.