A068387 - OEIS

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A068387

Prime coefficients in the Engel expansion of Pi = prime values in A006784(n).

%I #14 May 12 2023 12:20:15

%S 17,19,1236467,12670930520527,238010096542661,

%T 1556215151728015474002572174232146034933078744209044582588391660602774177237968073343

%N Prime coefficients in the Engel expansion of Pi = prime values in A006784(n).

%o (PARI) /* 5000 significant digits */ s=asin(1)*2; for(i=0,1000,s=s*ceil(1/s)-1; if(isprime(ceil(1/s))==1,print1(ceil(1/s),",")); );

%Y Cf. A006784.

%K easy,nonn

%O 1,1

%A _Benoit Cloitre_, Mar 03 2002