1,1

Table of n, a(n) for n=1..63.

(PARI) for(n=1, 300, q=n+1; while((q^2+1)%(n^2+1)>0, q++); if(q==n^2-n+1, print1(n, ", ")))

Cf. A065876.

Sequence in context: A174328 A272570 A123101 * A331802 A271108 A179401

Adjacent sequences: A071554 A071555 A071556 * A071558 A071559 A071560

easy,nonn

Benoit Cloitre, May 30 2002

approved