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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A183271 Half the number of nXnXn triangular binary arrays with the number of 0-0 adjacencies equal to the number of 1-1 adjacencies 1
 1, 0, 0, 65, 1578, 0, 0, 1875535329, 839252581538, 0, 0, 5227844810759073967200, 39228698077486633860579435, 0, 0, 1102249786277252805957700361396650437576, 135380785027014267422923708062639569342712090, 0, 0 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,4 COMMENTS a(n)=0 for n mod 4 = 2 or 3 because the number of edges is odd and flipping a 0 to a 1 changes the relative counts by an even number LINKS R. H. Hardin, Table of n, a(n) for n = 1..59 EXAMPLE Some solutions for 4X4X4 with a(1,1)=0 and equal 0-0 and 1-1 adjacencies .....0........0........0........0........0........0........0........0 ....1.0......1.0......0.0......1.0......1.1......1.0......0.1......1.1 ...1.0.0....1.0.0....1.0.1....1.0.1....0.1.1....0.0.1....1.0.1....0.0.0 ..1.1.1.0..0.1.1.1..0.1.1.1..1.1.0.0..0.0.0.0..0.1.1.1..0.1.0.1..1.1.1.0 CROSSREFS Sequence in context: A086029 A221038 A221501 * A197088 A031604 A002502 Adjacent sequences: A183268 A183269 A183270 * A183272 A183273 A183274 KEYWORD nonn AUTHOR R. H. Hardin Jan 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 | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified September 26 02:15 EDT 2023. Contains 365649 sequences. (Running on oeis4.)