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A239991 Number of 7 X n 0..3 arrays with no element equal to zero plus the sum of elements to its left or two plus the sum of the elements above it or one plus the sum of the elements diagonally to its northwest, modulo 4. 1
15, 208, 4113, 70107, 1174822, 16721012, 226886115, 2823199343, 33074332722, 366468588411, 3862531765288, 38827887664460, 374132975836928, 3462018008021025, 30769710869286232, 262533007814160639 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 7 of A239986.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..53

EXAMPLE

Some solutions for n=3:

..3..0..0....3..0..0....3..0..0....3..0..0....3..0..0....3..0..0....3..0..0

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

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

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

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

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

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

CROSSREFS

Sequence in context: A271333 A051813 A280160 * A274563 A028230 A122572

Adjacent sequences:  A239988 A239989 A239990 * A239992 A239993 A239994

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 30 2014

STATUS

approved

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Last modified January 21 10:05 EST 2022. Contains 350476 sequences. (Running on oeis4.)