Number of nX4 0..1 arrays with each 1 adjacent to 3, 4 or 6 king-move neighboring 1s.
A297016
Number of nX4 0..1 arrays with each 1 adjacent to 3, 4 or 6 king-move neighboring 1s.
Terms
- a(0) =1a(1) =4a(2) =14a(3) =46a(4) =150a(5) =590a(6) =2355a(7) =9521a(8) =39410a(9) =163110a(10) =680680a(11) =2847658a(12) =11910305a(13) =49901827a(14) =209178469a(15) =876800876a(16) =3676299398a(17) =15416057028a(18) =64644686369a(19) =271089072107
External references
- oeis: A297016