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

A264133

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

Terms

    a(0) =1a(1) =13a(2) =169a(3) =1040a(4) =6400a(5) =53280a(6) =443556a(7) =3383280a(8) =25806400a(9) =203738480a(10) =1608491236a(11) =12558632416a(12) =98054154496a(13) =768752950768

External references