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A278305 Number of nX4 0..2 arrays with rows and columns in lexicographic nondecreasing order but with exactly one mistake. 1
51, 2089, 70795, 2360544, 79562696, 2506281752, 69684770828, 1689884963173, 36045826631067, 685286426542689, 11759467817079518, 184109136699624075, 2653459164462630395, 35466423366457631706, 442375217765486649151 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A278309.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

R. H. Hardin, Empirical polynomial of degree 161

FORMULA

Empirical polynomial of degree 161 (see link above)

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Cf. A278309.

Sequence in context: A014943 A278623 A288604 * A231660 A210177 A210080

Adjacent sequences:  A278302 A278303 A278304 * A278306 A278307 A278308

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 17 2016

STATUS

approved

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Last modified December 1 13:38 EST 2021. Contains 349429 sequences. (Running on oeis4.)