Domb numbers: number of 2n-step polygons on diamond lattice.

A002895

Domb numbers: number of 2n-step polygons on diamond lattice.

Terms

    a(0) =1a(1) =4a(2) =28a(3) =256a(4) =2716a(5) =31504a(6) =387136a(7) =4951552a(8) =65218204a(9) =878536624a(10) =12046924528a(11) =167595457792

External references