Number of n X n symmetric 0..4 arrays with rows, considered as 5-ary numbers, in strictly increasing order.

A162129

Number of n X n symmetric 0..4 arrays with rows, considered as 5-ary numbers, in strictly increasing order.

Terms

    a(0) =5a(1) =60a(2) =2760a(3) =484080a(4) =338068896a(5) =978499965120

External references