Number of n X 6 0..1 arrays with rows and columns unimodal and antidiagonals nondecreasing.

A223775

Number of n X 6 0..1 arrays with rows and columns unimodal and antidiagonals nondecreasing.

Terms

    a(0) =22a(1) =169a(2) =707a(3) =2164a(4) =5573a(5) =12975a(6) =28346a(7) =59231a(8) =119555a(9) =234348a(10) =447489a(11) =834107a(12) =1520016a(13) =2711565a(14) =4740623a(15) =8131175a(16) =13696273a(17) =22676975a(18) =36938539a(19) =59243658a(20) =93628083a(21) =145910759a(22) =224378788a(23) =340697347a(24) =511106363a(25) =757979538a(26) =1111837505

External references