A230784 Number of nX4 0..3 arrays x(i,j) with each element horizontally, vertically, diagonally or antidiagonally next to at least one element with value (x(i,j)+1) mod 4, and upper left element zero

0, 820, 117372, 14875702, 1986882996, 265749521034, 35493529463278, 4740947736896364, 633274321865930072, 84589617891954381282, 11299056033900192621348, 1509271228479641269394190

Offset

1,2

Comments

Column 4 of A230787

Links

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

R. H. Hardin, Empirical recurrence of order 67

Formula

Empirical recurrence of order 67 (see link above)

Example

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

Crossrefs

Sequence in context: A043460 A038489 A210150 * A022254 A095964 A342064

Adjacent sequences: A230781 A230782 A230783 * A230785 A230786 A230787

Keyword

nonn

Author

R. H. Hardin, Oct 30 2013

Status

approved