First row of symmetric square table A085484, in which the main diagonal is equal to the first row shift left.

A085485

First row of symmetric square table A085484, in which the main diagonal is equal to the first row shift left.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =8a(4) =40a(5) =224a(6) =1368a(7) =9008a(8) =63488a(9) =476160a(10) =3781512a(11) =31664480a(12) =278523280a(13) =2565244096a(14) =24668577152a(15) =247071942208

External references