Number of sequences of n integers p(i) i=0..n-1 with 0<=p(i)<=6*i and -6<p(i)-p(i-1)<=6.
A180911
Number of sequences of n integers p(i) i=0..n-1 with 0<=p(i)<=6*i and -6<p(i)-p(i-1)<=6.
Terms
- a(0) =1a(1) =7a(2) =69a(3) =728a(4) =7996a(5) =89712a(6) =1020651a(7) =11723768a(8) =135611317a(9) =1576988939a(10) =18414581185a(11) =215742738765
External references
- oeis: A180911