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A325568 a(1) = 0; for n > 1, a(n) = 1 + a(A325567(n)). 5
0, 1, 1, 2, 1, 2, 1, 3, 2, 2, 1, 3, 1, 2, 1, 4, 1, 3, 1, 3, 2, 2, 1, 4, 1, 2, 1, 3, 1, 2, 1, 5, 2, 2, 2, 4, 1, 2, 1, 4, 1, 3, 1, 3, 2, 2, 1, 5, 2, 2, 1, 3, 1, 2, 1, 4, 1, 2, 1, 3, 1, 2, 1, 6, 2, 3, 1, 3, 1, 3, 1, 5, 1, 2, 2, 3, 1, 2, 1, 5, 1, 2, 1, 4, 1, 2, 1, 4, 1, 3, 1, 3, 2, 2, 1, 6, 1, 3, 1, 3, 1, 2, 1, 4, 2 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,4
LINKS
FORMULA
a(1) = 0; for n > 1, a(n) = 1 + a(A325567(n)).
a(n) <= A001222(n) for all n.
PROG
(PARI)
A048720(b, c) = fromdigits(Vec(Pol(binary(b))*Pol(binary(c)))%2, 2);
A065621(n) = bitxor(n-1, n+n-1);
A325567(n) = if(1==n, n, fordiv(n, d, if((d>1)&&A048720(A065621(n/d), d)==n, return(n/d))));
A325568(n) = if(1==n, 0, 1+A325568(A325567(n)));
CROSSREFS
Sequence in context: A305302 A340382 A055181 * A326195 A073811 A125030
KEYWORD
nonn
AUTHOR
Antti Karttunen, May 09 2019
STATUS
approved

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Last modified April 12 22:36 EDT 2024. Contains 371639 sequences. (Running on oeis4.)