10737418242domain: NAppears in sequencesa(n) = 1*T(n,0) + 2*T(n,1) + ... + (2n+1)*T(n,2n), T given by A027926.at n=27A027992Basis for code in A075926.at n=27A075927Number of vertices on the surface of an icosahedron.at n=16A122973