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 A183290 Half the number of nXnXnXn triangular pyramidal binary arrays with the number of 0-0 adjacencies equal to the number of 1-1 adjacencies 1
 1, 3, 75, 43857, 960006269, 1466084347024748, 302925464053912372874616, 16658979732689967888192414390784353, 482781472857798712221209645418994183476323697006 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS R. H. Hardin, Table of n, a(n) for n = 1..18 EXAMPLE Some solutions for 3X3X3X3 with a(1,1,1)=0 ....0......0......0......0......0......0......0......0......0......0......0 ... ....0......0......0......0......0......0......0......0......0......0......0 ...0.0....0.0....0.0....0.1....0.1....0.1....0.1....0.1....0.1....0.1....0.1 ... ....0......1......1......0......1......1......0......1......1......0......1 ...1.1....1.1....1.1....0.1....0.1....0.1....1.0....1.0....1.0....1.1....1.1 ..1.1.1..0.1.1..1.1.0..1.1.1..0.1.1..1.1.0..1.1.1..0.1.1..1.1.0..1.0.1..0.0.1 CROSSREFS Sequence in context: A195263 A034940 A300924 * A336062 A320306 A359500 Adjacent sequences: A183287 A183288 A183289 * A183291 A183292 A183293 KEYWORD nonn AUTHOR R. H. Hardin Jan 03 2011 STATUS approved

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Last modified September 7 13:04 EDT 2024. Contains 375730 sequences. (Running on oeis4.)