Number of n X 4 0..1 arrays with rows nondecreasing and antidiagonals unimodal.
A224129
Number of n X 4 0..1 arrays with rows nondecreasing and antidiagonals unimodal.
Terms
- a(0) =5a(1) =25a(2) =106a(3) =419a(4) =1635a(5) =6392a(6) =25047a(7) =98221a(8) =385194a(9) =1510527a(10) =5923295a(11) =23227112a(12) =91080915a(13) =357157713a(14) =1400531394a(15) =5491938683a(16) =21535675531a(17) =84448377880a(18) =331149514687
External references
- oeis: A224129