A187629
Number of (n+1)X(n+1) 0..1 arrays with the array of 2X2 subblock determinants antisymmetric under horizontal and vertical reflection and each non-centerline 2X2 subblock nonsingular.
Original entry on oeis.org
10, 24, 24, 954, 954, 194008, 194008, 196196792, 196196792, 1031851558448, 1031851558448, 27419179198175312, 27419179198175312
Offset: 1
Some solutions for 4X4
..0..1..1..0....1..0..0..1....1..0..0..1....0..1..1..1....1..1..1..0
..1..0..0..1....0..1..1..1....1..1..1..1....1..0..0..1....1..0..0..1
..1..0..0..1....0..1..1..1....1..1..1..1....1..0..0..1....1..0..0..1
..1..1..1..1....1..0..0..1....1..0..0..1....1..1..1..1....0..1..1..0
A187630
Number of (n+1)X(n+1) 0..2 arrays with the array of 2X2 subblock determinants antisymmetric under horizontal and vertical reflection and each non-centerline 2X2 subblock nonsingular.
Original entry on oeis.org
31, 446, 1648, 557382, 672698, 21411605018, 22329564088
Offset: 1
Some solutions for 4X4
..2..0..0..2....2..1..2..0....1..1..1..0....1..2..2..1....0..1..2..1
..1..1..1..0....2..0..0..1....2..0..0..2....2..2..2..2....2..0..0..1
..2..2..2..0....1..0..0..1....2..0..0..1....2..2..2..2....1..0..0..1
..1..0..0..1....2..2..2..2....1..1..2..0....1..2..2..1....1..2..2..1
A187631
Number of (n+1)X(n+1) 0..3 arrays with the array of 2X2 subblock determinants antisymmetric under horizontal and vertical reflection and each non-centerline 2X2 subblock nonsingular.
Original entry on oeis.org
64, 2924, 14044, 31903442, 33869160
Offset: 1
Some solutions for 4X4
..1..2..3..1....0..2..1..2....3..2..2..2....1..1..3..0....1..2..2..3
..3..0..0..2....1..0..0..2....3..0..0..3....3..0..0..1....1..0..0..1
..3..0..0..2....2..0..0..2....2..0..0..2....1..0..0..1....2..0..0..1
..0..2..3..3....2..1..1..3....2..3..3..1....2..3..3..1....0..1..2..2
A187632
Number of (n+1)X(n+1) 0..4 arrays with the array of 2X2 subblock determinants antisymmetric under horizontal and vertical reflection and each non-centerline 2X2 subblock nonsingular.
Original entry on oeis.org
113, 12104, 106892, 686589106, 795758912
Offset: 1
Some solutions for 4X4
..3..1..3..0....0..4..4..4....0..4..3..2....0..2..4..0....1..4..4..4
..3..0..0..1....1..0..0..1....3..0..0..4....2..0..0..1....1..0..0..1
..1..0..0..3....2..0..0..1....4..0..0..3....1..0..0..2....4..0..0..1
..3..3..1..0....1..2..4..0....2..3..4..2....2..4..2..0....4..1..4..3
A187634
Number of 4X4 0..n arrays with the array of 2X2 subblock determinants antisymmetric under horizontal and vertical reflection and each non-centerline 2X2 subblock nonsingular.
Original entry on oeis.org
24, 1648, 14044, 106892, 306320, 1848504, 3549080, 9810932, 19774644, 44235868, 65964188, 188874084, 261388436, 423186604, 755637740, 1198594384, 1533264084, 2755012728, 3428332204, 5907685880, 8225807516
Offset: 1
Some n=3 solutions for 4X4
..2..3..3..3....1..0..0..1....3..3..3..1....0..1..1..1....0..1..2..3
..2..0..0..2....2..1..1..0....2..0..0..2....2..0..0..2....2..0..0..1
..3..0..0..2....2..1..1..0....2..0..0..2....1..0..0..2....1..0..0..2
..3..2..3..1....3..1..1..1....1..3..3..1....1..2..1..0....3..2..1..2
A187635
Number of 5X5 0..n arrays with the array of 2X2 subblock determinants antisymmetric under horizontal and vertical reflection and each non-centerline 2X2 subblock nonsingular.
Original entry on oeis.org
954, 557382, 31903442, 686589106, 7836968262
Offset: 1
Some n=3 solutions for 5X5
..2..0..2..1..2....2..0..2..1..2....2..0..2..3..2....2..0..2..0..2
..0..1..0..1..0....0..3..0..3..0....0..2..0..2..0....0..2..2..2..2
..1..2..3..1..1....3..0..2..0..3....2..2..1..1..2....3..0..1..0..3
..0..1..0..1..0....0..3..1..3..1....0..2..0..2..0....0..2..0..2..2
..2..1..2..0..2....2..3..3..3..3....2..0..2..3..2....2..0..2..1..3
Showing 1-6 of 6 results.
Comments