A220762 Number of 2Xn arrays of the minimum value of corresponding elements and their horizontal, diagonal or antidiagonal neighbors in a random 0..3 2Xn array

16, 28, 268, 708, 4766, 15724, 88434, 331024, 1683150, 6777522, 32549034, 136712744, 635507042, 2735089882, 12478735816, 54465787400, 245847114384, 1081768683254, 4852872926630, 21453251299430, 95899957070006

Offset

1,1

Comments

Row 2 of A220761

Links

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

Formula

Empirical: a(n) = 2*a(n-1) +13*a(n-2) -10*a(n-3) +12*a(n-4) -41*a(n-5) +6*a(n-6) -16*a(n-7) -40*a(n-8) +4*a(n-9) +64*a(n-11) +32*a(n-12)

Example

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

Crossrefs

Sequence in context: A184031 A206259 A064803 * A353597 A246345 A054314

Adjacent sequences: A220759 A220760 A220761 * A220763 A220764 A220765

Keyword

nonn

Author

R. H. Hardin Dec 19 2012

Status

approved