A171577 - OEIS

%I #12 Jan 26 2023 12:38:42

%S 0,1,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89,

%T 97,101,103,107,109,113,127,131,137,139,149,151,157,163,167,173,179,

%U 181,191,193,197,199,211,223,227,229,233,239,241,251,257,263,269,271,277

%N 0, 1 and primes > 3.

%C 0 together with A140475. [_Arkadiusz Wesolowski_, Aug 26 2011]

%t Join[{0,1},Prime[Range[3,60]]] (* _Harvey P. Dale_, May 06 2018 *)

%o (PARI) a(n)=if(n>2,prime(n),n-1) \\ _Charles R Greathouse IV_, Aug 26 2011

%K nonn,easy

%O 1,3

%A _Juri-Stepan Gerasimov_, Dec 12 2009, Dec 16 2009