Number of (n+2)X(7+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00010001.
A260543
Number of (n+2)X(7+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00010001.
Terms
- a(0) =2732a(1) =4296a(2) =11370a(3) =22212a(4) =40916a(5) =105058a(6) =219852a(7) =434066a(8) =1050126a(9) =2356780a(10) =4693462a(11) =10782734a(12) =24926220a(13) =51270870a(14) =112254332a(15) =260975658a(16) =556547696a(17) =1188249860a(18) =2722931988a(19) =5983413184a(20) =12716775116a(21) =28508190056a(22) =63712199118
External references
- oeis: A260543