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A252632 Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 3 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 3 4 6 or 7 1
572, 1684, 12840, 95904, 2641643, 101563107, 1669555189, 288820014768, 55492673837676, 1690135439315021, 1875667003386936703, 1685749221369593646127, 88842428411400555382137 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Diagonal of A252640
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..19
EXAMPLE
Some solutions for n=4
..1..2..0..2..2..0....0..3..1..3..0..1....2..2..0..2..2..0....2..2..3..2..2..3
..0..2..2..3..2..2....0..2..2..3..2..2....1..3..0..1..3..0....0..2..2..3..2..2
..0..1..3..3..1..0....2..3..2..2..3..2....2..3..2..2..3..2....0..1..3..3..1..0
..2..2..3..2..2..0....3..0..1..3..3..1....2..2..3..2..2..3....2..2..3..2..2..3
..3..2..2..0..2..2....3..2..2..0..2..2....1..0..3..1..0..3....3..2..2..0..2..2
..3..1..3..3..1..0....2..0..2..2..3..2....2..0..2..2..0..2....0..1..3..3..1..0
CROSSREFS
Sequence in context: A252640 A252641 A360129 * A263813 A231244 A252115
Adjacent sequences: A252629 A252630 A252631 * A252633 A252634 A252635
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 19 2014
STATUS
approved

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Last modified August 29 21:13 EDT 2024. Contains 375518 sequences. (Running on oeis4.)