Number of nX6 nonnegative integer arrays with upper left 0 and lower right n+6-6 and value increasing by 0 or 1 with every step right or down.
A252928
Number of nX6 nonnegative integer arrays with upper left 0 and lower right n+6-6 and value increasing by 0 or 1 with every step right or down.
Terms
- a(0) =5a(1) =120a(2) =2859a(3) =53950a(4) =762227a(5) =8241540a(6) =71297441a(7) =512868867a(8) =3160111147a(9) =17063990547a(10) =82211677028a(11) =358529577294
External references
- oeis: A252928