Number of (n+2) X (1+2) 0..1 arrays with each 3 X 3 subblock having clockwise perimeter pattern 00000001 or 00000101.

A259765

Number of (n+2) X (1+2) 0..1 arrays with each 3 X 3 subblock having clockwise perimeter pattern 00000001 or 00000101.

Terms

    a(0) =32a(1) =49a(2) =104a(3) =201a(4) =376a(5) =745a(6) =1494a(7) =2897a(8) =5610a(9) =11065a(10) =21780a(11) =42461a(12) =82984a(13) =162977a(14) =319406a(15) =624529a(16) =1222926a(17) =2397205a(18) =4694532a(19) =9189573a(20) =17999120a(21) =35259025a(22) =69046594a(23) =135207885a(24) =264815462a(25) =518655749a(26) =1015714340a(27) =1989176813a(28) =3895806716

External references