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A187408 T(n,k)=Number of (n+1)X(n+1) 0..k arrays with diagonal zero and the i,j-th 2X2 subblock sum equal to the j,i-th 2X2 subblock sum 7
4, 9, 20, 16, 141, 152, 25, 580, 4743, 1984, 36, 1751, 59008, 378999, 50176, 49, 4332, 426425, 18555136, 77470101, 2677760, 64, 9331, 2164680, 397056235, 19210448896, 43182942669, 306864128, 81, 18152, 8583967, 4935992256, 1500716036725 (list; table; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Table starts
.................4......................9......................16
................20....................141.....................580
...............152...................4743...................59008
..............1984.................378999................18555136
.............50176...............77470101.............19210448896
...........2677760............43182942669..........68711440384000
.........306864128.........69704886620367......884085911344119808
.......73913860096.....343603587128867631.42474221110291056295936
....36612251582464.5351921330163734358189
.36818799747399680
LINKS
EXAMPLE
Some k=3 solutions for 4X4
..0..2..3..0....0..2..2..2....0..0..3..0....0..1..2..0....0..3..0..1
..3..0..2..2....1..0..2..1....1..0..2..2....2..0..1..3....3..0..2..1
..2..2..0..2....3..2..0..0....1..3..0..3....1..1..0..0....1..1..0..0
..2..1..3..0....2..0..1..0....2..1..3..0....1..3..0..0....2..0..2..0
CROSSREFS
Sequence in context: A359278 A241351 A023377 * A211055 A336025 A308482
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin Mar 09 2011
STATUS
approved

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Last modified February 22 16:01 EST 2024. Contains 370256 sequences. (Running on oeis4.)