This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A208201 T(n,k)=Number of nXk 0..3 arrays with new values 0..3 introduced in row major order and no element equal to more than two of its immediate leftward or upward or left-upward diagonal neighbors 8
 1, 2, 2, 5, 14, 5, 15, 178, 178, 15, 51, 2653, 10366, 2653, 51, 187, 41272, 639701, 639701, 41272, 187, 715, 648569, 39725054, 156617480, 39725054, 648569, 715, 2795, 10215440, 2468504665, 38372808893, 38372808893, 2468504665, 10215440, 2795 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Table starts ....1.........2.............5.................15......................51 ....2........14...........178...............2653...................41272 ....5.......178.........10366.............639701................39725054 ...15......2653........639701..........156617480.............38372808893 ...51.....41272......39725054........38372808893..........37069738362057 ..187....648569....2468504665......9402035642924.......35810971705853725 ..715..10215440..153402542384...2303673397508915....34594950233928279876 .2795.160984657.9533100532733.564442821781056268.33420220819293699707599 LINKS R. H. Hardin, Table of n, a(n) for n = 1..220 EXAMPLE Some solutions for n=4 k=3 ..0..0..1....0..0..0....0..1..1....0..0..0....0..1..1....0..0..0....0..1..0 ..0..2..0....0..1..1....0..0..0....1..1..0....1..0..0....0..1..2....0..2..3 ..1..2..1....2..0..2....0..1..1....0..1..0....0..1..0....1..1..3....3..0..0 ..3..0..0....2..1..0....0..2..1....0..1..0....1..0..0....1..0..0....2..1..3 CROSSREFS Column 1 is A007581(n-1) Sequence in context: A241114 A208392 A282275 * A185966 A032097 A176856 Adjacent sequences:  A208198 A208199 A208200 * A208202 A208203 A208204 KEYWORD nonn,tabl AUTHOR R. H. Hardin Feb 24 2012 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 19 20:04 EDT 2019. Contains 322291 sequences. (Running on oeis4.)