Number of 3 X n 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 0 1 and 1 0 1 vertically.
A207171
Number of 3 X n 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 0 1 and 1 0 1 vertically.
Terms
- a(0) =6a(1) =36a(2) =90a(3) =261a(4) =624a(5) =1482a(6) =3808a(7) =9512a(8) =23280a(9) =58080a(10) =144996a(11) =359100a(12) =891940a(13) =2220008a(14) =5514460a(15) =13697376a(16) =34051032a(17) =84622140a(18) =210256020a(19) =522523332a(20) =1298558624a(21) =3226860476a(22) =8018895456a(23) =19927723520a(24) =49521161364a(25) =123062138780a(26) =305817249300
External references
- oeis: A207171