a(n) = (7*n + 2)^7.A017011a(n) = (7*n + 2)^7.Terms a(0) =128a(1) =4782969a(2) =268435456a(3) =3404825447a(4) =21870000000a(5) =94931877133a(6) =319277809664a(7) =897410677851External referencesoeis: A017011