Number of (n+2)X(5+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00010101 01010101 or 01010111.
A260135
Number of (n+2)X(5+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00010101 01010101 or 01010111.
Terms
- a(0) =472a(1) =1626a(2) =7698a(3) =24696a(4) =89000a(5) =365308a(6) =1340176a(7) =4872072a(8) =18722120a(9) =70481648a(10) =261099100a(11) =983277524a(12) =3703246800a(13) =13842606580a(14) =51913534988a(15) =195076841960a(16) =731304173564
External references
- oeis: A260135