A187704 - OEIS

A187704

Number of (n+1)X(n+1) 0..5 arrays with each 2X2 subblock off diagonal and antidiagonal nonsingular and the array of 2X2 subblock determinants antisymmetric about the diagonal and antidiagonal

170, 93476, 2904, 4225652, 12898

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Column 5 of A187705

LINKS

Table of n, a(n) for n=1..5.

EXAMPLE

Some solutions for 4X4

..3..2..0..0....0..0..1..0....2..2..4..0....1..1..0..0....2..2..4..0

..3..2..2..4....3..2..1..0....5..5..5..0....1..1..2..4....2..2..2..0

..5..2..2..2....2..2..1..2....0..2..2..2....3..1..2..3....0..2..2..2

..0..0..2..2....4..4..1..2....0..5..0..0....0..0..2..3....0..4..2..2

CROSSREFS

Sequence in context: A098244 A250957 A114048 * A263059 A243294 A015975

Adjacent sequences: A187701 A187702 A187703 * A187705 A187706 A187707

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 12 2011

STATUS

approved