The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A199126 Number of nX1 0..2 arrays with values 0..2 introduced in row major order, the number of instances of each value within one of each other, and no element equal to any horizontal or vertical neighbor 2
 1, 1, 1, 3, 6, 5, 19, 37, 29, 124, 240, 182, 834, 1614, 1198, 5746, 11137, 8142, 40336, 78332, 56620, 287358, 559134, 400598, 2071558, 4038130, 2872754, 15079270, 29443040, 20824778, 110653854, 216379650, 152303410, 817542980, 1600817660 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,4 COMMENTS Column 1 of A199133 LINKS R. H. Hardin, Table of n, a(n) for n = 1..200 FORMULA Conjecture: a(3n) = A190917(n). - R. J. Mathar, Nov 01 2015 EXAMPLE All solutions for n=5 ..0....0....0....0....0....0 ..1....1....1....1....1....1 ..2....2....2....0....2....0 ..0....1....0....2....1....1 ..2....2....1....1....0....2 CROSSREFS Sequence in context: A048724 A292682 A328403 * A247569 A115389 A303564 Adjacent sequences:  A199123 A199124 A199125 * A199127 A199128 A199129 KEYWORD nonn AUTHOR R. H. Hardin Nov 03 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 April 3 17:03 EDT 2020. Contains 333197 sequences. (Running on oeis4.)