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A278793
Number of nX2 0..3 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly two mistakes.
1
0, 44, 1713, 34348, 468496, 4888659, 41698446, 303361302, 1938464178, 11113364813, 58083296635, 280168918756, 1259424247108, 5317482568472, 21222955187222, 80498197428443, 291472386647409, 1011352733367759
(list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Column 2 of A278798.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
R. H. Hardin, Empirical polynomial of degree 44
FORMULA
Empirical polynomial of degree 44 (see link above)
EXAMPLE
Some solutions for n=4
..1..3. .1..3. .3..1. .0..3. .1..3. .3..0. .3..2. .0..2. .3..0. .3..2
..2..1. .1..0. .1..1. .2..0. .0..1. .0..3. .1..2. .0..2. .2..0. .2..2
..0..1. .1..2. .0..2. .3..1. .3..0. .3..2. .1..3. .3..0. .3..1. .3..3
..3..0. .3..1. .1..2. .1..0. .3..1. .0..0. .0..1. .1..0. .0..2. .2..0
CROSSREFS
Cf. A278798.
Sequence in context: A004340 A231262 A223049 * A004295 A162882 A163230
Adjacent sequences: A278790 A278791 A278792 * A278794 A278795 A278796
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 28 2016
STATUS
approved

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Last modified December 11 07:22 EST 2024. Contains 378604 sequences.
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