a(n) = (5/32)*A000045(6*n)^2.A292443a(n) = (5/32)*A000045(6*n)^2.Terms a(0) =0a(1) =10a(2) =3240a(3) =1043290a(4) =335936160a(5) =108170400250External referencesoeis: A292443