%N Primes n such that sigma(n-4) < n.
%C Except for the first term, members are primes of the form p+4 with p prime, i.e. the sequence is essentially A031505, A046132. In other words the solutions to sigma(x)<x+4 are 1,2,4 and the odd primes. - R. Stephan, Feb 09 2004
%Y Cf. A025584, A046022.
%A _Benoit Cloitre_, Feb 08 2002
%E Edited by _Charles R Greathouse IV_, Mar 19 2010