1,2

a(n) >= n.

It appears that the density of n such that a(n) = n is 1/2.

Eric M. Schmidt, Table of n, a(n) for n = 1..10000

Index entries for sequences related to automorphic numbers

(GAP) A214881 := function(max) local result, i; result := [6]; for i in [2..max] do Add(result, (2*result[i-1] - result[i-1]^2) mod 10^i); od; result := List(result, x->Valuation(x, 2)); return result; end;

Cf. A214880, A214882, A214883.

Sequence in context: A058189 A069208 A066113 * A163831 A192419 A081836

Adjacent sequences: A214878 A214879 A214880 * A214882 A214883 A214884

nonn,base

Eric M. Schmidt, Jul 29 2012

approved