Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 0100-1110-0111-0010 pattern in any orientation.

A146915

Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 0100-1110-0111-0010 pattern in any orientation.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =1a(8) =11a(9) =13a(10) =27a(11) =33a(12) =133a(13) =219a(14) =963a(15) =1827a(16) =9211a(17) =19753a(18) =116805a(19) =296331a(20) =2039489a(21) =6042741a(22) =48834357a(23) =168628779a(24) =1599274085a(25) =6457217399a(26) =71498858193a(27) =337187982951

External references