This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A186878 Number of (n+2)X8 0..3 arrays with every 3X3 subblock commuting with each horizontal and vertical neighbor 3X3 subblock 1
 186096, 18517, 32992, 108640, 230224, 287368, 338176, 414184, 568744, 927136, 1492600, 2387392, 4046104, 6975931, 11357422, 19105849, 32364013, 52661545, 88036021, 148729189, 243684934, 407116792, 686279218, 1129121971, 1883516491 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 6 of A186881 LINKS R. H. Hardin, Table of n, a(n) for n = 1..200 FORMULA Empirical: a(n)=2*a(n-1)-a(n-2)+3*a(n-3)-6*a(n-4)+3*a(n-5)+3*a(n-6)-3*a(n-7) for n>14 EXAMPLE Some solutions for 4X8 ..0..0..0..0..2..0..0..2....0..0..0..0..0..0..0..1....0..0..0..0..0..0..0..0 ..0..0..0..0..0..2..0..0....0..0..0..0..0..0..0..1....2..0..0..0..0..0..0..0 ..2..0..0..0..0..0..2..0....1..0..0..0..0..0..0..0....2..2..0..0..0..0..0..0 ..0..0..0..0..0..0..0..2....3..0..0..0..0..0..0..0....3..2..2..0..0..0..0..1 CROSSREFS Sequence in context: A032748 A180099 A092013 * A192103 A203442 A216901 Adjacent sequences:  A186875 A186876 A186877 * A186879 A186880 A186881 KEYWORD nonn AUTHOR R. H. Hardin Feb 28 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
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified August 26 01:44 EDT 2019. Contains 326324 sequences. (Running on oeis4.)