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A084572 Let a(1)=1; for n>1, a(n)=nextprime((Pi/2)*a(n-1)). 1

%I

%S 1,2,5,11,19,31,53,89,149,239,379,599,941,1481,2333,3671,5779,9091,

%T 14281,22433,35251,55373,86981,136649,214651,337189,529657,832003,

%U 1306913,2052899,3224687,5065351,7956661,12498313,19632329,30838393

%N Let a(1)=1; for n>1, a(n)=nextprime((Pi/2)*a(n-1)).

%o (PARI) a(n)=if(n<2,1,nextprime((Pi/2)*a(n-1))); for(n=1,50,print1(a(n),","))

%Y Cf. A084571.

%K nonn

%O 1,2

%A _Paul D. Hanna_, May 30 2003

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Last modified October 22 05:36 EDT 2021. Contains 348160 sequences. (Running on oeis4.)