A234755 Number of (n+1)X(3+1) 0..3 arrays with 2X2 edge jumps all no more than +1 in one of the clockwise or counterclockwise directions or both.

8968, 646036, 41065150, 2683721676, 174451064914, 11352560005654, 738613242438722, 48057390396250352, 3126794045459927262, 203441328354140321486, 13236675571733137508104, 861229107849713487636906

Offset: 1

Author

R. H. Hardin, Dec 30 2013

Keywords

• nonn

Comments

Column 3 of A234760

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210
• R. H. Hardin, Empirical recurrence of order 55

Formula

Empirical recurrence of order 55 (see link above)