Number of nX7 0..1 arrays with every element unequal to 0, 1, 2 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
A318074
Number of nX7 0..1 arrays with every element unequal to 0, 1, 2 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =64a(1) =190a(2) =404a(3) =861a(4) =2195a(5) =9966a(6) =46884a(7) =184156a(8) =819263a(9) =3703730a(10) =15865269a(11) =69944965a(12) =310937380a(13) =1361781447a(14) =5998215467a(15) =26503896368a(16) =116659469704a(17) =513984726015
External references
- oeis: A318074