Number of 3 X n binary arrays with rows and columns lexicographically nondecreasing and column sums nondecreasing.

A266429

Number of 3 X n binary arrays with rows and columns lexicographically nondecreasing and column sums nondecreasing.

Terms

    a(0) =4a(1) =13a(2) =39a(3) =106a(4) =259a(5) =574a(6) =1170a(7) =2223a(8) =3982a(9) =6787a(10) =11089a(11) =17472a(12) =26677a(13) =39628a(14) =57460a(15) =81549a(16) =113544a(17) =155401a(18) =209419a(19) =278278a(20) =365079a(21) =473386a(22) =607270a(23) =771355a(24) =970866a(25) =1211679a(26) =1500373a(27) =1844284a(28) =2251561a(29) =2731224

External references