Number of (n+2)X(1+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00010011.

A260760

Number of (n+2)X(1+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00010011.

Terms

    a(0) =48a(1) =82a(2) =190a(3) =350a(4) =622a(5) =1315a(6) =2478a(7) =4597a(8) =9184a(9) =17591a(10) =33096a(11) =64829a(12) =124590a(13) =236647a(14) =458914a(15) =883290a(16) =1686838a(17) =3255660a(18) =6266216a(19) =12003508a(20) =23114992a(21) =44476139a(22) =85340062a(23) =164169628a(24) =315782978a(25) =606459354a(26) =1166124310a(27) =2242522630a(28) =4308761510

External references