|
|
A071577
|
|
Smallest k such that 2ik+1 is squarefree for 1<=i<=n.
|
|
0
|
|
|
1, 1, 1, 5, 5, 5, 5, 9, 9, 9, 9, 9, 9, 9, 9, 63, 63, 63, 63, 63, 63, 63, 63, 135, 135, 135, 135, 135, 135, 135, 135, 135, 135, 135, 135, 135, 135, 135, 135, 135, 135, 135, 135, 735, 735, 735, 945, 945, 945, 1155, 1155, 1155, 1155, 1155, 1155, 1155
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,4
|
|
LINKS
|
|
|
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
|
|
|
STATUS
|
approved
|
|
|
|