Number of (n+1) X (7+1) 0..1 arrays with each 2 X 2 subblock having clockwise pattern 0000 0011 or 0101.

A259221

Number of (n+1) X (7+1) 0..1 arrays with each 2 X 2 subblock having clockwise pattern 0000 0011 or 0101.

Terms

    a(0) =311a(1) =421a(2) =588a(3) =869a(4) =1325a(5) =2078a(6) =3319a(7) =5377a(8) =8804a(9) =14545a(10) =24225a(11) =40670a(12) =68843a(13) =117557a(14) =202636a(15) =352813a(16) =620837a(17) =1104574a(18) =1987407a(19) =3616121a(20) =6651956a(21) =12365081a(22) =23211193a(23) =43964734a(24) =83952995a(25) =161472013a(26) =312533724a(27) =608223317a(28) =1189192349a(29) =2334286430

External references