Number of 4Xn 0..3 arrays with diagonals and antidiagonals unimodal and rows nondecreasing.
A224393
Number of 4Xn 0..3 arrays with diagonals and antidiagonals unimodal and rows nondecreasing.
Terms
- a(0) =256a(1) =10000a(2) =86701a(3) =497958a(4) =2332222a(5) =9331553a(6) =32806574a(7) =103452812a(8) =297410156a(9) =789731500a(10) =1957606141a(11) =4569537752a(12) =10116846904a(13) =21372349639a(14) =43300242010a(15) =84493906854a(16) =159387825448a(17) =291579791772a(18) =518714491591a(19) =899524090772
External references
- oeis: A224393