Number of nX3 0..2 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order.

A278802

Number of nX3 0..2 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order.

Terms

    a(0) =10a(1) =63a(2) =322a(3) =1439a(4) =5767a(5) =20972a(6) =69834a(7) =214774a(8) =615120a(9) =1653047a(10) =4196501a(11) =10123619a(12) =23327383a(13) =51572441a(14) =109818385a(15) =225997932a(16) =450803519a(17) =873872396a(18) =1649976645a(19) =3040564120a(20) =5478446820a(21) =9666837555a(22) =16728604905a(23) =28427944695a(24) =47495149011

External references