T(n,k)=1/4 the number of nXk 0..3 arrays with no element equal both to the element above and to the element to its left.
A185567
T(n,k)=1/4 the number of nXk 0..3 arrays with no element equal both to the element above and to the element to its left.
Terms
- a(0) =1a(1) =4a(2) =4a(3) =16a(4) =60a(5) =16a(6) =64a(7) =900a(8) =900a(9) =64a(10) =256a(11) =13500a(12) =50580a(13) =13500a(14) =256a(15) =1024a(16) =202500a(17) =2842560a(18) =2842560a(19) =202500a(20) =1024a(21) =4096a(22) =3037500a(23) =159749820a(24) =598507920a(25) =159749820a(26) =3037500a(27) =4096a(28) =16384a(29) =45562500
External references
- oeis: A185567