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A278798 T(n,k)=Number of nXk 0..3 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly two mistakes. 6
0, 0, 0, 4, 44, 4, 65, 1713, 1713, 65, 456, 34348, 145208, 34348, 456, 2128, 468496, 7196852, 7196852, 468496, 2128, 7728, 4888659, 263134490, 1038462658, 263134490, 4888659, 7728, 23607, 41698446, 7804657491, 118098679534, 118098679534 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,4

COMMENTS

Table starts

.....0..........0..............4..................65......................456

.....0.........44...........1713...............34348...................468496

.....4.......1713.........145208.............7196852................263134490

....65......34348........7196852..........1038462658.............118098679534

...456.....468496......263134490........118098679534...........44796204800108

..2128....4888659.....7804657491......11262497170744........14688350983557860

..7728...41698446...197112382716.....935318457135084......4251350673984802232

.23607..303361302..4361870602212...69345852411053594...1107217648453587546275

.63460.1938464178.86190316947578.4667384731526157594.263642550140680566002158

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..111

FORMULA

Empirical for column k:

k=1: [polynomial of degree 11]

k=2: [polynomial of degree 44]

k=3: [polynomial of degree 173]

EXAMPLE

Some solutions for n=3 k=4

..0..0..0..2. .0..0..0..3. .0..0..3..0. .0..1..1..0. .0..0..0..3

..0..0..3..2. .1..1..3..3. .1..1..1..2. .1..1..0..1. .0..1..1..2

..1..1..0..1. .1..1..3..3. .1..0..2..2. .1..0..0..3. .0..3..1..0

CROSSREFS

Column 1 is A278547.

Sequence in context: A220675 A222979 A284192 * A102388 A284065 A344871

Adjacent sequences:  A278795 A278796 A278797 * A278799 A278800 A278801

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin, Nov 28 2016

STATUS

approved

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Last modified October 21 23:34 EDT 2021. Contains 348160 sequences. (Running on oeis4.)