Number of (n+1)X(1+1) 0..3 arrays with row and column sums nondecreasing, and no adjacent elements equal.

A233028

Number of (n+1)X(1+1) 0..3 arrays with row and column sums nondecreasing, and no adjacent elements equal.

Terms

    a(0) =34a(1) =96a(2) =333a(3) =912a(4) =2874a(5) =8070a(6) =25028a(7) =71492a(8) =221072a(9) =637090a(10) =1967353a(11) =5696300a(12) =17569092a(13) =51022742a(14) =157190828a(15) =457507314a(16) =1408016908a(17) =4105250676a(18) =12622211969a(19) =36855295684a(20) =113218810762a(21) =330996127114

External references