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%I #7 Jun 20 2021 08:32:34
%S 1,2,3,5,11,31,127,709,5381,2621,4591,4327,2179,1063,307,2027,103,563,
%T 4091,467,3319,2113,617,4549,3967,7607,4463,3299,1979,7717,5431,3001,
%U 2,3,5,11,31,127,709,5381,2621,4591,4327,2179,1063,307,2027,103,563,4091
%N a(1)=1; a(n)=prime(mod(a(n-1),1000)).
%C Starting with the second term, cycles every 31 terms.
%C Not the same sequence as a(1)=1; a(n)=mod(prime(a(n-1)),1000).
%F a(1)=1; a(n)=prime(mod(a(n-1),1000)).
%t f[s_List] := Block[{}, Append[s, Mod[ Prime@ Last@ s, 1000]]]; Nest[f, {2}, 50]
%t NestList[Prime[Mod[#,1000]]&,1,50] (* _Harvey P. Dale_, Jun 01 2012 *)
%K nonn,less
%O 1,2
%A _Robert G. Wilson v_, May 13 2007
%E NAME adapted to offset. - _R. J. Mathar_, Jun 20 2021
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