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

A264060

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

Terms

    a(0) =1a(1) =8a(2) =64a(3) =216a(4) =729a(5) =3375a(6) =15625a(7) =64000a(8) =262144a(9) =1124864a(10) =4826809a(11) =20346417a(12) =85766121a(13) =363994344a(14) =1544804416a(15) =6539203000a(16) =27680640625a(17) =117289217375a(18) =496981290961

External references