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!)
 A183501 T(n,k)=Half the number of nXk 0..2 arrays with no element equal to the sum mod 3 of its horizontal and vertical neighbors 9
 1, 3, 3, 4, 9, 4, 8, 36, 36, 8, 18, 128, 256, 128, 18, 32, 540, 2088, 2088, 540, 32, 64, 2048, 16512, 33057, 16512, 2048, 64, 132, 8256, 131072, 524288, 524288, 131072, 8256, 132, 256, 32784, 1048576, 8388608, 16796160, 8388608, 1048576, 32784, 256, 512, 131328 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Table starts ...1......3.........4...........8...........18............32............64 ...3......9........36.........128..........540..........2048..........8256 ...4.....36.......256........2088........16512........131072.......1048576 ...8....128......2088.......33057.......524288.......8388608.....134226432 ..18....540.....16512......524288.....16796160.....536870912...17180393472 ..32...2048....131072.....8388608....536870912...34359738368.2199023255552 ..64...8256...1048576...134226432..17180393472.2199023255552 .132..32784...8392704..2147483648.549761399856 .256.131328..67113216.34360795152 .512.524288.536870912 LINKS R. H. Hardin, Table of n, a(n) for n = 1..83 EXAMPLE Some solutions for 4X3 ..0..2..0....2..0..0....0..1..1....0..0..1....1..0..2....0..2..0....1..0..2 ..0..0..2....1..0..1....1..1..2....2..0..2....2..2..0....2..0..2....2..2..1 ..1..0..1....0..0..0....1..2..1....1..1..0....0..1..1....1..1..0....0..1..2 ..2..2..1....1..2..0....0..1..1....2..2..1....1..2..1....2..2..1....1..2..2 CROSSREFS Column 6 is half of A183501, powers of 64 Sequence in context: A197431 A197672 A284115 * A086239 A016605 A185395 Adjacent sequences:  A183498 A183499 A183500 * A183502 A183503 A183504 KEYWORD nonn,tabl AUTHOR R. H. Hardin Jan 05 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 May 26 08:39 EDT 2020. Contains 334620 sequences. (Running on oeis4.)