|
0, 1, 1, 1, 1, 3, 1, 1, 1, 5, 1, 3, 1, 9, 5, 1, 1, 17, 1, 3, 9, 33, 1, 17, 1, 65, 1, 5, 1, 7, 1, 1, 33, 129, 3, 9, 1, 257, 65, 5, 1, 11, 1, 17, 9, 513, 1, 129, 1, 1025, 257, 33, 1, 2049, 17, 3, 513, 4097, 1, 7, 1, 8193, 5, 1, 33, 19, 1, 65, 1025, 13, 1, 3, 1, 16385, 2049, 129, 9, 35, 1, 65, 1, 32769, 1, 11, 129, 65537, 4097, 5, 1, 21, 17, 257
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,6
|
|
LINKS
|
|
|
FORMULA
|
|
|
PROG
|
(PARI)
A000265(n) = (n/2^valuation(n, 2));
A289271(n) = { my(v=0, i=0, x=1); for(d=2, oo, if(n==1, return(v)); if(1==gcd(x, d)&&1==omega(d), if(!(n%d)&&1==gcd(d, n/d), v += 2^i; n /= d; x *= d); i++)); }; \\ After Rémy Sigrist's program for A289271.
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|