Number of n X 4 0..2 arrays with rows and columns unimodal and antidiagonals nondecreasing.
A224053
Number of n X 4 0..2 arrays with rows and columns unimodal and antidiagonals nondecreasing.
Terms
- a(0) =46a(1) =698a(2) =5219a(3) =27246a(4) =115716a(5) =428949a(6) =1442005a(7) =4492529a(8) =13133871a(9) =36307595a(10) =95412314a(11) =239342404a(12) =575169570a(13) =1328404782a(14) =2957341785a(15) =6363295591a(16) =13266197675a(17) =26858140315a(18) =52913319943a(19) =101631438086a(20) =190636635796
External references
- oeis: A224053