A145031 - OEIS

%I #4 Mar 30 2012 17:35:01

%S 5,9,45,81,675,1215,14175,28431,72171,597051,2679075,885735,10333575,

%T 89813529,286446699,390609135,789189885,7274895849,55142849601,

%U 204945438681,154580775111,1049522104701,596240132571,1307544150375

%N Smallest odd n-almost prime m such that m-2 and m+2 are both prime (cousin primes).

%H Donovan Johnson, <a href="/A145031/b145031.txt">Table of n, a(n) for n=1..203</a>

%e a(5) = 675 = 3^3*5^2 is a 5-almost prime and 675-2 and 675+2 are both prime (cousin primes). 675 is the smallest such 5-almost prime.

%Y Cf. A023200, A046132, A068525.

%K nonn

%O 1,1

%A _Donovan Johnson_, Sep 30 2008