Number of n X 2 0..1 arrays with the number of 1's king-move adjacent to some 0 equal to the number of 0's adjacent to some 1, with top left element zero.
A284107
Number of n X 2 0..1 arrays with the number of 1's king-move adjacent to some 0 equal to the number of 0's adjacent to some 1, with top left element zero.
Terms
- a(0) =2a(1) =4a(2) =13a(3) =46a(4) =160a(5) =571a(6) =2095a(7) =7802a(8) =29326a(9) =111040a(10) =422862a(11) =1617611a(12) =6210935a(13) =23922207a(14) =92387315a(15) =357629430a(16) =1387192894a(17) =5390374430a(18) =20979391112a(19) =81768490420a(20) =319107181678
External references
- oeis: A284107