Number of (n+1)X(5+1) 0..1 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction.
A250653
Number of (n+1)X(5+1) 0..1 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction.
Terms
- a(0) =49a(1) =103a(2) =211a(3) =427a(4) =859a(5) =1723a(6) =3451a(7) =6907a(8) =13819a(9) =27643a(10) =55291a(11) =110587a(12) =221179a(13) =442363a(14) =884731a(15) =1769467a(16) =3538939a(17) =7077883a(18) =14155771a(19) =28311547a(20) =56623099a(21) =113246203a(22) =226492411a(23) =452984827a(24) =905969659a(25) =1811939323a(26) =3623878651
External references
- oeis: A250653