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A280960 Number of nX7 0..2 arrays with no element equal to more than one of its horizontal, vertical and antidiagonal neighbors and with new values introduced in order 0 sequentially upwards. 1
224, 23593, 402077, 9986376, 251270618, 6052621154, 148137367471, 3624578433814, 88500510514256, 2162800206884214, 52848406746190667, 1291317121466531838, 31553229218022226192, 770996700142671487457 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 7 of A280961.
LINKS
EXAMPLE
Some solutions for n=2
..0..1..2..0..2..1..2. .0..1..2..0..1..0..2. .0..1..0..1..2..1..0
..0..2..1..2..0..2..0. .2..0..1..0..1..0..1. .0..1..2..0..2..0..2
CROSSREFS
Cf. A280961.
Sequence in context: A007771 A229459 A051367 * A076007 A280672 A204977
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 11 2017
STATUS
approved

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Last modified February 28 21:38 EST 2024. Contains 370400 sequences. (Running on oeis4.)