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A280312 Number of nX5 0..2 arrays with no element equal to more than one of its horizontal and vertical neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards. 1
2, 2348, 415198, 43973846, 3802506340, 292789164101, 20928606452792, 1420117779715304, 92727577807583380, 5878153262169254234, 363975877747806304034, 22111094005640269417429, 1322118576776642717332563 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A280313.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..21

EXAMPLE

Some solutions for n=2

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

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

CROSSREFS

Cf. A280313.

Sequence in context: A280899 A288164 A133074 * A276650 A135234 A274962

Adjacent sequences:  A280309 A280310 A280311 * A280313 A280314 A280315

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 31 2016

STATUS

approved

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Last modified October 23 16:46 EDT 2019. Contains 328373 sequences. (Running on oeis4.)