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A179990

Logarithms (cf. A179989) f:{1,...,n}->Z/nZ such that either (i) n is odd or (ii) n is even and f(m) is even whenever m divides n/2.

1, 1, 2, 0, 8, 2, 36, 16, 24, 8, 140, 0, 936, 312, 416, 96, 3648, 576, 30240, 4608, 9792, 3360, 103488, 10368, 72960, 13752, 22896, 1296, 134400, 23424, 2671200, 556800, 794400, 202752, 145152, 7488, 3594240, 1013472, 1202688, 102912, 17606400

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OFFSET

1,3

COMMENTS

These special logarithms play an important role in the theory of k-radius sequences.

LINKS

Table of n, a(n) for n=1..41.

S. R. Blackburn and J. F. McKee, Constructing k-radius sequences

CROSSREFS

Cf. A179989

Sequence in context: A298522 A206436 A146543 * A228156 A182524 A212832

Adjacent sequences: A179987 A179988 A179989 * A179991 A179992 A179993

KEYWORD

nonn

AUTHOR

James McKee (james.mckee(AT)rhul.ac.uk), Aug 05 2010

STATUS

approved

URL: https://oeis.org/A179990

⇱ A179990 - OEIS