Number of length n+1 nonnegative integer arrays starting and ending with 0 with adjacent elements differing by no more than 3.

A204208

Number of length n+1 nonnegative integer arrays starting and ending with 0 with adjacent elements differing by no more than 3.

Terms

    a(0) =1a(1) =4a(2) =16a(3) =78a(4) =404a(5) =2208a(6) =12492a(7) =72589a(8) =430569a(9) =2596471a(10) =15870357a(11) =98102191a(12) =612222083a(13) =3852015239a(14) =24408653703a(15) =155629858911a(16) =997744376239

External references