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A252306 Number of (1+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 1 3 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 1 3 6 or 7 1
864, 1126, 1675, 2670, 4349, 7138, 12027, 20001, 33175, 56339, 94176, 156500, 266470, 446079, 742112, 1264356, 2117176, 3525323, 6004166, 10052927, 16753070, 28510417, 47726510, 79602575, 135332893, 226509989, 378121578, 642150721 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Row 1 of A252305
LINKS
EXAMPLE
Some solutions for n=4
..0..0..0..0..0..3....0..2..1..3..2..1....1..3..2..1..0..2....1..3..2..1..3..3
..3..1..2..3..1..3....2..3..1..2..3..2....1..2..0..1..2..0....3..0..0..1..2..3
..1..3..2..1..3..2....0..0..0..0..0..1....0..3..3..0..0..3....0..1..0..0..0..3
CROSSREFS
Sequence in context: A252297 A252298 A252305 * A184451 A203662 A179671
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 16 2014
STATUS
approved

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Last modified April 16 05:35 EDT 2024. Contains 371697 sequences. (Running on oeis4.)