Number of nX1 0..3 arrays with exactly floor(nX1/2) elements unequal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..3 order.
A222269
Number of nX1 0..3 arrays with exactly floor(nX1/2) elements unequal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..3 order.
Terms
- a(0) =1a(1) =0a(2) =0a(3) =3a(4) =4a(5) =8a(6) =10a(7) =55a(8) =72a(9) =294a(10) =378a(11) =1883a(12) =2440a(13) =11920a(14) =15408a(15) =78255a(16) =101330a(17) =517050a(18) =669658a(19) =3451712a(20) =4473984a(21) =23156964a(22) =30030364a(23) =156076271a(24) =202510224a(25) =1055435486a(26) =1370043450a(27) =7157673375a(28) =9295027344a(29) =48656943008
External references
- oeis: A222269