A071243 - OEIS

%I #6 Mar 14 2015 01:58:21

%S 1,2,4,6,16,64,1024,4096,65536,262144,4194304,268435456,1073741824,

%T 68719476736,1099511627776,4398046511104,70368744177664,

%U 4503599627370496,288230376151711744,1152921504606846976

%N Record terms in A005179.

%C The only term that is not a power of 2 is the 4th term 6.

%C Essentially the same as A061286 with terms {1,6} added.

%F For n>2, a(n+2) = A061286(n) = 2^(A000040(n)-1) = 2^A006093(n).

%Y Cf. A005179.

%K nonn

%O 1,2

%A _Amarnath Murthy_, May 20 2002

%E Edited, corrected and extended by _Ray Chandler_, Jun 28 2008