Number of n X n symmetric 0..6 arrays with rows, considered as 7-ary numbers, in strictly increasing order.

A162131

Number of n X n symmetric 0..6 arrays with rows, considered as 7-ary numbers, in strictly increasing order.

Terms

    a(0) =7a(1) =168a(2) =20664a(3) =13420008a(4) =48646451448

External references