Number of (n+2)X(3+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000101 or 00001011.

A261550

Number of (n+2)X(3+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000101 or 00001011.

Terms

    a(0) =170a(1) =269a(2) =516a(3) =754a(4) =1210a(5) =2187a(6) =3436a(7) =5368a(8) =9414a(9) =14902a(10) =22538a(11) =38820a(12) =62948a(13) =95896a(14) =161958a(15) =263965a(16) =405226a(17) =675457a(18) =1107300a(19) =1715143a(20) =2825384a(21) =4636573a(22) =7238868a(23) =11834981a(24) =19424306a(25) =30536389a(26) =49628386a(27) =81354986a(28) =128648034a(29) =208252970

External references