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 A183827 T(n,k)=1/256 the number of (n+1)X(k+1) 0..3 arrays with no 2X2 subblock being a reflection across the shared element pair of any horizontal or vertical neighbor 8
 1, 15, 15, 225, 813, 225, 3375, 43947, 43947, 3375, 50625, 2377341, 8538066, 2377341, 50625, 759375, 128578815, 1661285961, 1661285961, 128578815, 759375, 11390625, 6954559893, 323115202755, 1163575148283, 323115202755, 6954559893, 11390625 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Table starts ...........1...............15.................225..................3375 ..........15..............813...............43947...............2377341 .........225............43947.............8538066............1661285961 ........3375..........2377341..........1661285961.........1163575148283 .......50625........128578815........323115202755.......814479338538099 ......759375.......6954559893......62851591581012....570213177028325955 ....11390625.....376152548283...12225396762980829.399185865558804067443 ...170859375...20345104031589.2378005715920214025 ..2562890625.1100412240703119 .38443359375 LINKS R. H. Hardin, Table of n, a(n) for n = 1..60 EXAMPLE Some solutions with upper left block zero for 4X3 ..0..0..0....0..0..3....0..0..2....0..0..2....0..0..0....0..0..1....0..0..1 ..0..0..1....0..0..3....0..0..2....0..0..1....0..0..2....0..0..3....0..0..1 ..1..0..3....1..2..0....0..3..2....2..1..1....2..2..0....2..3..0....1..0..3 ..3..3..0....2..2..2....0..2..3....3..1..1....1..3..3....2..2..1....1..0..0 CROSSREFS Column 1 is A001024(n-1) Sequence in context: A240980 A134912 A165836 * A094836 A247388 A291575 Adjacent sequences:  A183824 A183825 A183826 * A183828 A183829 A183830 KEYWORD nonn,tabl AUTHOR R. H. Hardin Jan 07 2011 STATUS approved

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Last modified August 11 00:55 EDT 2022. Contains 356046 sequences. (Running on oeis4.)