1,1

Table of n, a(n) for n=1..81.

(PARI) a(n)=if(n<1, 0, k=1; while(isprime(k*n!-1)==0, k++); k)

Cf. A084730.

Sequence in context: A140056 A240239 A247044 * A085427 A172130 A202449

Adjacent sequences: A083660 A083661 A083662 * A083664 A083665 A083666

nonn

Benoit Cloitre, Jun 14 2003

approved