A158855 - cp's OEIS frontend

A158855 a(n), a(n+1), a(n+2), for n=5,8,11,... are respectively the numbers of representations of the integers 2^k-2, 2^k, 2^k+2, where k=(n+4)/3, by unordered sums of two odd primes not belonging to A158847.

%I A158855 #4 Jun 02 2025 01:27:51
%S A158855 2,0,2,5,0,4,6,0,7,18,0,8,10,0,23,51,0,25,43,0,68,206,0,79,93,0,214,
%T A158855 397,0,280,445,0,684,1650,0,630,1008,0,2136,4894,0,3065,3682,0,6853
%N A158855 a(n), a(n+1), a(n+2), for n=5,8,11,... are respectively the numbers of representations of the integers 2^k-2, 2^k, 2^k+2, where k=(n+4)/3, by unordered sums of two odd primes not belonging to A158847.
%Y A158855 A158847 A156537
%K A158855 nonn,uned
%O A158855 14,1
%A A158855 _Vladimir Shevelev_, Mar 28 2009

cp's OEIS Frontend

A158855 a(n), a(n+1), a(n+2), for n=5,8,11,... are respectively the numbers of representations of the integers 2^k-2, 2^k, 2^k+2, where k=(n+4)/3, by unordered sums of two odd primes not belonging to A158847.