a(n) = n*11^n - 1.A064757a(n) = n*11^n - 1.Terms a(0) =10a(1) =241a(2) =3992a(3) =58563a(4) =805254a(5) =10629365a(6) =136410196a(7) =1714871047a(8) =21221529218a(9) =259374246009External referencesoeis: A064757