Number of nX6 0..1 arrays with every element equal to 1 or 2 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
A300348
Number of nX6 0..1 arrays with every element equal to 1 or 2 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =5a(1) =90a(2) =133a(3) =325a(4) =729a(5) =1371a(6) =3092a(7) =6068a(8) =12638a(9) =26306a(10) =55227a(11) =116124a(12) =244628a(13) =515923a(14) =1089092a(15) =2300375a(16) =4859824a(17) =10269075a(18) =21701677a(19) =45866023a(20) =96942392a(21) =204906286a(22) =433123097a(23) =915543514a(24) =1935335582a(25) =4091114685a(26) =8648362831a(27) =18282350436
External references
- oeis: A300348