Number of (n+2) X (1+2) 0..1 arrays with each 3 X 3 subblock having clockwise perimeter pattern 00001011 00010101 or 01010101.

A261373

Number of (n+2) X (1+2) 0..1 arrays with each 3 X 3 subblock having clockwise perimeter pattern 00001011 00010101 or 01010101.

Terms

    a(0) =36a(1) =39a(2) =60a(3) =97a(4) =154a(5) =247a(6) =392a(7) =618a(8) =977a(9) =1548a(10) =2461a(11) =3894a(12) =6176a(13) =9774a(14) =15513a(15) =24552a(16) =38963a(17) =61662a(18) =97854a(19) =154866a(20) =245769a(21) =388956a(22) =617257a(23) =976878a(24) =1550272a(25) =2453478a(26) =3893581a(27) =6162024a(28) =9778911a(29) =15476214

External references