%I #2 Mar 30 2012 18:40:08

%S 1,2,4,6,7,5,3,8,9,10,12,13,11,14,15,16,18,19,17,20,21,22,23,24,25,26,

%T 27,28,30,31,29,32,33,34,35,36,37,38,39,40,42,43,41,44,45,46,47,48,49,

%U 50,51,52,53,54,55,56,57,58,60,61,59,62,63,64,65,66,67,68,69,70,72,73

%N Natural numbers with swapped twin primes and adjacent nonprimes.

%K nonn

%O 1,2

%A _Giovanni Teofilatto_, Nov 09 2009