a(n) = (6*n)^7.A016915a(n) = (6*n)^7.Terms a(0) =0a(1) =279936a(2) =35831808a(3) =612220032a(4) =4586471424a(5) =21870000000a(6) =78364164096a(7) =230539333248a(8) =587068342272External referencesoeis: A016915