Number of n X 2 0..2 arrays with rows, columns and antidiagonals unimodal and diagonals nondecreasing.
A223927
Number of n X 2 0..2 arrays with rows, columns and antidiagonals unimodal and diagonals nondecreasing.
Terms
- a(0) =9a(1) =54a(2) =218a(3) =698a(4) =1915a(5) =4690a(6) =10511a(7) =21919a(8) =43045a(9) =80334a(10) =143496a(11) =246728a(12) =410255a(13) =662242a(14) =1041133a(15) =1598477a(16) =2402305a(17) =3541126a(18) =5128614a(19) =7309062a(20) =10263683a(21) =14217842a(22) =19449307a(23) =26297611a(24) =35174621a(25) =46576414a(26) =61096564a(27) =79440948
External references
- oeis: A223927