Number of (n+2)X(6+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00001011.

A260499

Number of (n+2)X(6+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00001011.

Terms

    a(0) =1600a(1) =2115a(2) =5219a(3) =9616a(4) =13651a(5) =31078a(6) =67993a(7) =103520a(8) =205769a(9) =478636a(10) =814781a(11) =1474039a(12) =3329758a(13) =6280086a(14) =11053808a(15) =23440140a(16) =46913222a(17) =84184848a(18) =168447589a(19) =344315004a(20) =638782384a(21) =1233316423a(22) =2511417269a(23) =4802082633a(24) =9139233197

External references