Number of nX3 0..1 arrays with every element equal to 1, 2, 3 or 6 king-move adjacent elements, with upper left element zero.
A297988
Number of nX3 0..1 arrays with every element equal to 1, 2, 3 or 6 king-move adjacent elements, with upper left element zero.
Terms
- a(0) =1a(1) =17a(2) =48a(3) =146a(4) =424a(5) =1274a(6) =3820a(7) =11529a(8) =34783a(9) =104826a(10) =315711a(11) =950990a(12) =2864947a(13) =8631274a(14) =26003209a(15) =78338270a(16) =236004118a(17) =710993764a(18) =2141965614a(19) =6452965003a(20) =19440438745a(21) =58566971613a(22) =176440981687a(23) =531552505076
External references
- oeis: A297988