Number of (n+2)X(6+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00001001.

A260292

Number of (n+2)X(6+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00001001.

Terms

    a(0) =2300a(1) =3591a(2) =8660a(3) =19157a(4) =29166a(5) =72652a(6) =168582a(7) =292171a(8) =625218a(9) =1609460a(10) =3089276a(11) =5899876a(12) =14968692a(13) =32584495a(14) =60074924a(15) =138997590a(16) =329692778a(17) =635872137a(18) =1328430704a(19) =3213573808a(20) =6701074756a(21) =13249275795a(22) =30807670852a(23) =68769864418

External references