A071556 Smallest x > 1 such that x^prime(n) == 1 mod(prime(i)) 4<=i<=n.

8, 78, 1002, 17018, 323324, 7436430, 215656442, 6685349672, 247357937828, 10141675450908, 436092044389002, 20496326086283048, 1086305282573001492, 64092011671807087970, 3909612711980232366110, 261944051702675568529304

Offset

4,1

Links

Table of n, a(n) for n=4..19.

Formula

a(n)=1+A002110(n)/30

Prog

(PARI) for(n=3, 20, print1((prod(i=1, n, prime(i))+30)/30, ", "))

Crossrefs

Sequence in context: A052698 A384514 A052603 * A316203 A303507 A145508

Adjacent sequences: A071553 A071554 A071555 * A071557 A071558 A071559

Keyword

easy,nonn

Author

Benoit Cloitre, May 30 2002

Status

approved