Number of n X 3 0..1 arrays with rows, columns and antidiagonals unimodal and diagonals nondecreasing.

A223765

Number of n X 3 0..1 arrays with rows, columns and antidiagonals unimodal and diagonals nondecreasing.

Terms

    a(0) =7a(1) =28a(2) =71a(3) =155a(4) =317a(5) =607a(6) =1097a(7) =1887a(8) =3112a(9) =4950a(10) =7631a(11) =11447a(12) =16763a(13) =24029a(14) =33793a(15) =46715a(16) =63582a(17) =85324a(18) =113031a(19) =147971a(20) =191609a(21) =245627a(22) =311945a(23) =392743a(24) =490484a(25) =607938a(26) =748207a(27) =914751a(28) =1111415a(29) =1342457

External references