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A222744 Number of nX5 0..3 arrays with exactly floor(nX5/2) elements equal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order 1
20, 7546, 6363724, 5989744766, 4906560167364, 4777709698876890, 4001484076145095954, 4007703500495273447052, 3396887706615718195456805, 3458279283218841589487839312, 2953874525277026876992243827814 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A222747

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..51

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A135292 A222721 A223051 * A234459 A013725 A307914

Adjacent sequences:  A222741 A222742 A222743 * A222745 A222746 A222747

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 04 2013

STATUS

approved

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Last modified June 16 14:16 EDT 2021. Contains 345057 sequences. (Running on oeis4.)