|
|
A360258
|
|
a(n) is the smallest k such that A360097(k) = n.
|
|
0
|
|
|
13, 14, 20, 7, 5, 10, 4, 9, 63, 6, 42, 1590, 1, 2, 5172911835, 974749335, 21, 26135070
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
LINKS
|
|
|
PROG
|
(PARI)
a360097(n)=my(k=1); while(isprime(2*n*k-1)||isprime(2*n*k+1), k++); k
a(n)=for(i=1, +oo, my(k=a360097(i)); if(k==n, return(i)))
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn,more
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|