Number of sequences of n integers p(i) i=0..n-1 with 0<=p(i)<=6*i and |p(i)-p(i-1)|<=6.

A180902

Number of sequences of n integers p(i) i=0..n-1 with 0<=p(i)<=6*i and |p(i)-p(i-1)|<=6.

Terms

    a(0) =1a(1) =7a(2) =70a(3) =763a(4) =8715a(5) =102221a(6) =1220268a(7) =14749175a(8) =179930563a(9) =2210840169a(10) =27320772214a(11) =339198895902

External references