Number of (n+2) X (7+2) 0..1 arrays with each 3 X 3 subblock having clockwise perimeter pattern 00010101 or 01010101.
A259741
Number of (n+2) X (7+2) 0..1 arrays with each 3 X 3 subblock having clockwise perimeter pattern 00010101 or 01010101.
Terms
- a(0) =265a(1) =760a(2) =3480a(3) =10570a(4) =35036a(5) =110886a(6) =416107a(7) =1244504a(8) =4489732a(9) =13887332a(10) =50550272a(11) =153892178a(12) =560073447a(13) =1715846404a(14) =6236321603a(15) =19065593974a(16) =69365627376a(17) =212174735776a(18) =771528061749
External references
- oeis: A259741