A230945 Number of (n+3)X(4+3) 0..3 white square subarrays x(i,j) with each element diagonally or antidiagonally next to at least one element with value (x(i,j)+1) mod 4, and upper left element zero

314, 1994, 85196, 606224, 22328204, 161835904, 6209914254, 44707108238, 1699524352562, 12251017200366, 466469474405852, 3361933958777160, 127984378310902748, 922429449651301216, 35115886181142148294

Offset

1,1

Comments

Column 4 of A230949

Links

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

R. H. Hardin, Empirical recurrence of order 70

Formula

Empirical recurrence of order 70 (see link above)

Example

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

Crossrefs

Sequence in context: A050818 A050807 A157621 * A183691 A284078 A231021

Adjacent sequences: A230942 A230943 A230944 * A230946 A230947 A230948

Keyword

nonn

Author

R. H. Hardin, Nov 01 2013

Status

approved