Number of n X 2 0..2 arrays with no element equal to any value at offset (-2,-1) (-2,1) or (-1,-1) and new values introduced in order 0..2.
A275260
Number of n X 2 0..2 arrays with no element equal to any value at offset (-2,-1) (-2,1) or (-1,-1) and new values introduced in order 0..2.
Terms
- a(0) =2a(1) =9a(2) =24a(3) =64a(4) =172a(5) =476a(6) =1320a(7) =3672a(8) =10220a(9) =28472a(10) =79376a(11) =221320a(12) =617160a(13) =1720976a(14) =4799104a(15) =13382832a(16) =37319536a(17) =104069760a(18) =290210016a(19) =809282592a(20) =2256773088a(21) =6293258240a(22) =17549436800a(23) =48938515904a(24) =136470379968a(25) =380562509568
External references
- oeis: A275260