A071546 Smallest integer > 1 of the form (k^2+1)/(n^2+1).

5, 2, 5, 10, 17, 26, 37, 5, 65, 82, 101, 2, 13, 170, 197, 226, 61, 10, 325, 362, 5, 61, 13, 530, 577, 626, 41, 149, 785, 65, 73, 17, 149, 146, 1157, 1226, 41, 74, 1445, 1522, 1601, 317, 397, 373, 1937, 221, 97, 74, 2305, 26, 2501, 130, 493, 2810, 5, 3026, 29

Offset: 1

Author

Benoit Cloitre, May 30 2002

Keywords

• easy
• nonn

Crossrefs

Cf. A065876.

Programs

PARI

for(n=1,70,s=n+1; while((s^2+1)%(n^2+1)>0,s++); print1((s^2+1)/(n^2+1),","))

Formula

a(n)=(A065876(n)^2+1)/(n^2+1)