Sum of the digits of n^(n^n).A088735Sum of the digits of n^(n^n).Terms a(0) =1a(1) =7a(2) =81a(3) =733a(4) =9695a(5) =162828a(6) =3131332a(7) =68186341a(8) =1663600878a(9) =1External referencesoeis: A088735