Number of 3 X n 0..3 arrays with rows nondecreasing and antidiagonals unimodal.

A224025

Number of 3 X n 0..3 arrays with rows nondecreasing and antidiagonals unimodal.

Terms

    a(0) =64a(1) =1000a(2) =6796a(3) =32523a(4) =122523a(5) =387729a(6) =1074167a(7) =2679260a(8) =6137666a(9) =13104218a(10) =26368076a(11) =50439449a(12) =92358199a(13) =162782299a(14) =277423483a(15) =458907498a(16) =739147146a(17) =1162327788a(18) =1788617172a(19) =2698724343a(20) =3999445995a(21) =5830352933a(22) =8371784327

External references