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A235254 Number of (n+1)X(4+1) 0..7 arrays with every 2X2 subblock having its diagonal sum differing from its antidiagonal sum by 7, with no adjacent elements equal (constant stress tilted 1X1 tilings) 1
10820, 30300, 80812, 247368, 717452, 2337832, 7200188, 24526880, 79038828, 278130808, 928595228, 3348693040, 11501925612, 42273509096, 148589755644, 554433956880, 1986244387756, 7503170736632, 27309763183164, 104229909761984 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A235258

LINKS

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

R. H. Hardin, Empirical recurrence of order 58

FORMULA

Empirical recurrence of order 58 (see link above)

EXAMPLE

Some solutions for n=3

..2..7..2..6..5....0..6..2..7..1....2..3..1..7..1....4..2..6..1..4

..4..2..4..1..7....4..3..6..4..5....7..1..6..5..6....1..6..3..5..1

..1..6..1..5..4....0..6..2..7..1....2..3..1..7..1....4..2..6..1..4

..4..2..4..1..7....3..2..5..3..4....7..1..6..5..6....1..6..3..5..1

CROSSREFS

Sequence in context: A203394 A144716 A123078 * A237190 A065321 A252064

Adjacent sequences:  A235251 A235252 A235253 * A235255 A235256 A235257

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 05 2014

STATUS

approved

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Last modified July 24 06:56 EDT 2021. Contains 346273 sequences. (Running on oeis4.)