OFFSET
1,1
COMMENTS
If a(n) = 0, n is a nontotient number - see (A005277)/2.
LINKS
T. D. Noe, Table of n, a(n) for n=1..10000
MATHEMATICA
a = Table[0, {100}]; Do[ t = EulerPhi[n]/2; If[t < 101, a[[t]] = n], {n, 1, 10^3}]; a
CROSSREFS
KEYWORD
nonn
AUTHOR
Robert G. Wilson v, Nov 08 2000
STATUS
approved