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A278729 Number of nX3 0..3 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly one mistake. 1
40, 1947, 58904, 1410818, 28637916, 506031118, 7907770636, 110655824716, 1401584381570, 16222274394016, 173007912264684, 1712497545142699, 15831976807688826, 137451501603516285, 1125976516897709842 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 3 of A278734.
LINKS
FORMULA
Empirical polynomial of degree 109 (see link above)
EXAMPLE
Some solutions for n=3
..2..2..1. .0..0..0. .1..0..0. .0..3..1. .3..1..1. .3..1..0. .2..0..0
..1..1..3. .1..2..1. .0..3..1. .0..3..1. .3..3..1. .0..0..0. .3..1..1
..2..2..2. .2..2..1. .1..1..3. .1..0..1. .2..0..0. .1..3..2. .1..2..0
CROSSREFS
Cf. A278734.
Sequence in context: A308836 A189503 A190076 * A189550 A300116 A060056
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 27 2016
STATUS
approved

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Last modified May 27 21:52 EDT 2024. Contains 372882 sequences. (Running on oeis4.)