Number of nX5 nonnegative integer arrays with upper left 0 and lower right n+5-5 and value increasing by 0 or 1 with every step right or down.
A252973
Number of nX5 nonnegative integer arrays with upper left 0 and lower right n+5-5 and value increasing by 0 or 1 with every step right or down.
Terms
- a(0) =4a(1) =61a(2) =770a(3) =6997a(4) =46812a(5) =248182a(6) =1100210a(7) =4230324a(8) =14477724a(9) =44951694a(10) =128484004a(11) =341970798a(12) =855386126a(13) =2025957453a(14) =4571859908a(15) =9881224135a(16) =20544547580a(17) =41246142411a(18) =80218821614a(19) =151563108019a(20) =278867435440a(21) =500751223536
External references
- oeis: A252973