A234765 Number of (n+1)X(4+1) 0..3 arrays with 2X2 edge jumps all no more than +1 in one of the clockwise or counterclockwise directions but not both

3800, 64180, 760072, 14119456, 197124696, 3593149200, 54068454752, 958972097240, 15068994560048, 261956551635124, 4225427992968580, 72488398300730176, 1187864422251939280, 20207001964346137308

Offset

1,1

Comments

Column 4 of A234769

Links

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

R. H. Hardin, Empirical recurrence of order 73

Formula

Empirical recurrence of order 73 (see link above)

Example

Some solutions for n=2
..3..1..3..3..3....3..1..2..1..2....3..2..2..2..0....0..1..3..1..3
..3..2..2..1..2....2..1..3..0..0....1..1..0..1..1....2..1..2..1..2
..3..1..0..1..3....3..1..2..1..2....3..2..2..2..3....3..0..3..3..2

Crossrefs

Sequence in context: A253280 A251518 A031793 * A228545 A179174 A232083

Adjacent sequences: A234762 A234763 A234764 * A234766 A234767 A234768

Keyword

nonn

Author

R. H. Hardin, Dec 30 2013

Status

approved