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A233912 Number of (n+1)X(3+1) 0..7 arrays with every 2X2 subblock having the sum of the squares of the edge differences equal to 30, and no two adjacent values equal 1
2440, 22632, 194208, 1813476, 15981048, 148503096, 1317291048, 12194674440, 108542688160, 1002043707452, 8941088637664, 82361200249948, 736372072644264, 6770660028757160, 60638120886991720, 556662134862492320 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A233917

LINKS

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

R. H. Hardin, Empirical recurrence of order 74

FORMULA

Empirical recurrence of order 74 (see link above)

EXAMPLE

Some solutions for n=3

..2..0..2..3....2..1..2..4....2..1..2..4....6..5..2..4....6..5..6..5

..1..4..5..7....0..4..6..3....0..4..6..7....3..7..6..3....4..1..3..1

..2..0..2..6....2..5..2..4....2..5..2..4....2..5..2..4....6..2..6..5

..1..4..1..4....6..7..3..7....3..1..3..0....6..7..3..7....7..4..3..1

CROSSREFS

Sequence in context: A253842 A253835 A253929 * A233678 A252554 A259007

Adjacent sequences:  A233909 A233910 A233911 * A233913 A233914 A233915

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 17 2013

STATUS

approved

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Last modified February 28 08:22 EST 2021. Contains 341695 sequences. (Running on oeis4.)