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A212024 Number of lower triangular n X n arrays colored with integers 0 upwards introduced in row major order, with no element equal to any horizontal, diagonal or antidiagonal neighbor, and containing the value n(n+1)/2-5 0
0, 0, 35, 4785, 440660, 14245030, 231475447, 2383699176, 17770342627 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
COMMENTS
Column 4 of A212026
LINKS
EXAMPLE
Some solutions for n=4
..0........0........0........0........0........0........0........0
..1.2......1.2......1.2......0.1......1.2......1.2......1.2......1.2
..0.3.4....3.4.3....3.4.1....0.2.3....3.2.0....3.4.0....3.4.5....0.3.4
..1.5.0.1..5.6.3.6..3.0.1.5..4.5.3.5..3.4.3.5..2.5.2.1..2.6.7.2..5.6.7.0
CROSSREFS
Sequence in context: A294851 A266053 A115963 * A231914 A202067 A336306
KEYWORD
nonn
AUTHOR
R. H. Hardin Apr 26 2012
STATUS
approved

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Last modified May 26 10:56 EDT 2024. Contains 372824 sequences. (Running on oeis4.)