Number of n X 4 0..2 arrays with diagonals and antidiagonals unimodal and rows nondecreasing.
A224349
Number of n X 4 0..2 arrays with diagonals and antidiagonals unimodal and rows nondecreasing.
Terms
- a(0) =15a(1) =225a(2) =2321a(3) =19608a(4) =160362a(5) =1351748a(6) =11704964a(7) =102319662a(8) =895494806a(9) =7833508842a(10) =68530349850a(11) =599768316699
External references
- oeis: A224349