A068387 Prime coefficients in the Engel expansion of Pi = prime values in A006784(n).

17, 19, 1236467, 12670930520527, 238010096542661, 1556215151728015474002572174232146034933078744209044582588391660602774177237968073343

Offset

1,1

Links

Table of n, a(n) for n=1..6.

Prog

(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), ", ")); );

Crossrefs

Cf. A006784.

Sequence in context: A162873 A174379 A178424 * A134539 A196571 A031169

Adjacent sequences: A068384 A068385 A068386 * A068388 A068389 A068390

Keyword

easy,nonn

Author

Benoit Cloitre, Mar 03 2002

Status

approved