Number of (n+1) X (2+1) arrays of permutations of 0..n*3+2 with each element having index change +-(.,.) 0,0 0,2 or 1,1.

A264106

Number of (n+1) X (2+1) arrays of permutations of 0..n*3+2 with each element having index change +-(.,.) 0,0 0,2 or 1,1.

Terms

    a(0) =9a(1) =40a(2) =169a(3) =714a(4) =3025a(5) =12816a(6) =54289a(7) =229970a(8) =974169a(9) =4126648a(10) =17480761a(11) =74049690a(12) =313679521a(13) =1328767776a(14) =5628750625a(15) =23843770274a(16) =101003831721a(17) =427859097160

External references