Number of sequences of n integers p(i) i=0..n-1 with 0<=p(i)<=9*i and -9<p(i)-p(i-1)<=9.
A180914
Number of sequences of n integers p(i) i=0..n-1 with 0<=p(i)<=9*i and -9<p(i)-p(i-1)<=9.
Terms
- a(0) =1a(1) =10a(2) =144a(3) =2240a(4) =36402a(5) =605600a(6) =10231704a(7) =174721408a(8) =3007128087a(9) =52066422332a(10) =905751324518
External references
- oeis: A180914