A206381 Number of (n+1)X7 0..3 arrays with every 2X2 subblock having the same number of equal diagonal or antidiagonal elements, and new values 0..3 introduced in row major order

385465, 222329489, 137393517193, 85678539791333, 53482634218458697, 33391295169652273181, 20848171803769792984489, 13016855431061639609291213, 8127274925445989337637081801, 5074392067217049794271345475469

Offset

1,1

Comments

Column 6 of A206383

Links

R. H. Hardin, Table of n, a(n) for n = 1..26

Example

Some solutions for n=4
..0..0..0..0..0..0..0....0..0..1..0..0..0..2....0..0..1..1..2..2..3
..0..1..0..1..0..2..0....3..0..0..0..2..0..0....2..2..2..3..3..0..3
..3..0..3..0..2..1..2....2..3..0..1..0..3..0....1..1..0..0..2..0..2
..1..3..2..3..0..2..0....0..2..3..0..3..3..3....2..3..2..1..1..3..2
..2..1..3..1..3..0..1....3..0..2..3..2..3..2....2..3..0..3..0..3..2

Crossrefs

Sequence in context: A205589 A157843 A206167 * A234216 A258686 A157739

Adjacent sequences: A206378 A206379 A206380 * A206382 A206383 A206384

Keyword

nonn

Author

R. H. Hardin Feb 07 2012

Status

approved