Number of n X n symmetric 0..3 arrays with rows, considered as 4-ary numbers, in nondecreasing order.

A162079

Number of n X n symmetric 0..3 arrays with rows, considered as 4-ary numbers, in nondecreasing order.

Terms

    a(0) =4a(1) =34a(2) =784a(3) =55759a(4) =12899284a(5) =10000841284

External references