OFFSET
1,4
PROG
(PARI) for(n=1, 56, s=1; while(sum(i=1, n, issquarefree(2*i*s+1))<n, s++); print1(s, ", "))
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Benoit Cloitre, May 31 2002
STATUS
approved