The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A205917 T(n,k) = number of (n+1) X (k+1) 0..2 arrays with every 2 X 2 subblock having the same number of clockwise edge increases as its horizontal neighbors and the same number of counterclockwise edge increases as its vertical neighbors. 8
 81, 369, 369, 1764, 1791, 1764, 8655, 9831, 9831, 8655, 43155, 60108, 87918, 60108, 43155, 218034, 387267, 875760, 875760, 387267, 218034, 1112664, 2554848, 8986929, 14150391, 8986929, 2554848, 1112664, 5722236, 17051166, 93488811, 231526056 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Table starts ......81.......369........1764..........8655...........43155............218034 .....369......1791........9831.........60108..........387267...........2554848 ....1764......9831.......87918........875760.........8986929..........93488811 ....8655.....60108......875760......14150391.......231526056........3820547082 ...43155....387267.....8986929.....231526056......6011669886......157611325827 ..218034...2554848....93488811....3820547082....157611325827.....6566654061039 .1112664..17051166...976932162...63265158237...4140502079766...274342874332980 .5722236.114537918.10250633343.1050303618804.109077858375072.11488530154756449 LINKS R. H. Hardin, Table of n, a(n) for n = 1..180 EXAMPLE Some solutions for n=4, k=3: ..1..0..2..2....0..0..1..0....1..2..1..2....1..2..2..0....2..1..1..1 ..1..0..0..0....1..1..1..0....1..2..1..2....2..2..0..0....2..0..1..2 ..1..1..1..0....2..1..0..0....1..1..1..1....1..2..2..2....0..2..1..0 ..2..1..0..0....1..1..0..1....1..0..1..2....1..1..2..1....1..1..1..1 ..1..1..1..0....1..0..0..0....0..0..1..2....0..1..1..1....2..0..1..2 CROSSREFS Column 1 is A205737. Sequence in context: A017378 A205736 A237850 * A205909 A237843 A205737 Adjacent sequences: A205914 A205915 A205916 * A205918 A205919 A205920 KEYWORD nonn,tabl AUTHOR R. H. Hardin, Feb 01 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 | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified August 12 18:36 EDT 2024. Contains 375113 sequences. (Running on oeis4.)