A072927 a(n) = minimum value of abs(n-Phi(x)) x>0.

0, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 2, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 2, 1, 0, 1, 0, 1, 0, 1, 2, 1, 0, 1, 2, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 2, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 2, 1, 0, 1, 0, 1, 2, 1, 0, 1, 0, 1, 2, 3, 2, 1, 0, 1, 0, 1, 0, 1, 0, 1, 2, 1, 0, 1, 2, 1, 0, 1, 2, 1, 0, 1, 2, 1, 0

Offset

1,14

Links

Table of n, a(n) for n=1..100.

Formula

a(A002202(n))=0 and it seems that sum(k=1, n, a(k)) is asymptotic to C*n*log(n) with C=0.15....

Crossrefs

Sequence in context: A123737 A083037 A247477 * A307194 A331218 A120086

Adjacent sequences: A072924 A072925 A072926 * A072928 A072929 A072930

Keyword

easy,nonn

Author

Benoit Cloitre, Aug 11 2002

Status

approved