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A198658 Number of nX4 0..7 arrays with values 0..7 introduced in row major order and each element equal to at least one horizontal or vertical neighbor 1
2, 76, 3904, 344044, 40065880, 6046334324, 1099981072751, 231069206905205, 53332894057280732, 13062771135606107106, 3312119561085281340968, 856694689962959996618514, 224079649012945587508397744 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A198661

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..17

EXAMPLE

Some solutions with all values 0 to 7 for n=4

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

..2..2..3..4....2..2..3..4....0..1..3..3....0..1..2..3....0..3..3..2

..5..6..3..4....5..5..3..4....4..5..5..6....4..5..6..6....4..5..5..6

..5..6..7..7....6..6..7..7....4..7..7..6....4..5..7..7....4..7..7..6

CROSSREFS

Sequence in context: A198704 A198623 A198651 * A277298 A087287 A266877

Adjacent sequences:  A198655 A198656 A198657 * A198659 A198660 A198661

KEYWORD

nonn

AUTHOR

R. H. Hardin Oct 28 2011

STATUS

approved

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Last modified April 8 21:44 EDT 2020. Contains 333329 sequences. (Running on oeis4.)