Number of nX6 nonnegative integer arrays with upper left 0 and lower right its king-move distance away minus 2 and every value increasing by 0 or 1 with every step right, diagonally se or down.
A252981
Number of nX6 nonnegative integer arrays with upper left 0 and lower right its king-move distance away minus 2 and every value increasing by 0 or 1 with every step right, diagonally se or down.
Terms
- a(0) =10a(1) =85a(2) =851a(3) =8487a(4) =67537a(5) =432842a(6) =5672484a(7) =36112108a(8) =129234988a(9) =322183180a(10) =635379492a(11) =1074743076a(12) =1640984356a(13) =2334103332a(14) =3154100004a(15) =4100974372a(16) =5174726436a(17) =6375356196a(18) =7702863652a(19) =9157248804a(20) =10738511652a(21) =12446652196
External references
- oeis: A252981