A089027 - OEIS

%I #12 Mar 30 2012 17:34:13

%S 1,1,1,5,1,7,1,9,10,1,12,13,1,15,16,17,1,19,20,1,22,23,24,25,26,1,28,

%T 1,30,31,32,33,1,35,1,37,38,39,40,41,1,43,1,45,1,47,48,49,1,51,52,1,

%U 54,55,56,57,1,59,60,1,62,63,64,1,66,67,68,69,1,71,72,73,74,75,76,77,78,79,80

%N a(n) =1 if the prime gap A001223(n) is <=2, otherwise a(n)=n+1.

%t digits=200 a=Table[If[Prime[n]-Prime[n-1]>2, n, 1], {n, 2, digits}]

%K nonn

%O 1,4

%A _Roger L. Bagula_, Nov 12 2003