Number of (n+2)X(2+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00010011.
A260761
Number of (n+2)X(2+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00010011.
Terms
- a(0) =82a(1) =115a(2) =265a(3) =481a(4) =798a(5) =1671a(6) =3196a(7) =5596a(8) =11008a(9) =21414a(10) =38685a(11) =73802a(12) =143343a(13) =265124a(14) =499236a(15) =961606a(16) =1804214a(17) =3387690a(18) =6472826a(19) =12229083a(20) =22991554a(21) =43688857a(22) =82748766a(23) =155915780a(24) =295370360a(25) =559665162a(26) =1056451639a(27) =1998590816a(28) =3785473856
External references
- oeis: A260761