Number of 0..5 arrays x(0..n+1) of n+2 elements without any interior element greater than both neighbors or less than both neighbors.
A200868
Number of 0..5 arrays x(0..n+1) of n+2 elements without any interior element greater than both neighbors or less than both neighbors.
Terms
- a(0) =106a(1) =356a(2) =1168a(3) =3886a(4) =12890a(5) =42744a(6) =141688a(7) =469726a(8) =1557320a(9) =5163158a(10) =17117854a(11) =56752072a(12) =188154290a(13) =623802050a(14) =2068138180a(15) =6856654898a(16) =22732385492a(17) =75366392740a(18) =249867889178a(19) =828405870894
External references
- oeis: A200868