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A324113
a(n) = -1, 0 or +1 depending on whether A156552(n) is A000120-deficient, -perfect or -abundant: a(n) = sign(A324100(n)).
2
-1, 0, -1, 1, -1, 1, -1, 1, 1, 1, -1, 1, -1, 1, 1, 1, -1, 1, -1, 1, 1, 1, -1, 1, 1, 1, 1, 1, 1, 1, -1, 1, 1, 1, 1, 1, -1, 1, 1, 1, -1, 1, -1, 1, 1, 1, -1, 1, 0, 1, -1, 1, -1, 1, -1, 1, 1, 1, -1, 1, 1, 1, 1, 1, 1, 1, 1, 1, -1, 1, 1, 1, 1, 1, 1, 1, 1, 1, -1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, -1, 1, -1, 1, -1, 1, -1
OFFSET
2
COMMENTS
a(n) = -1 if A156552(n) is in A175524, 0 if it is in A175522 and +1 if it is in A175526.
FORMULA
a(n) = sign(A324100(n)) = sign(A192895(A156552(n)).
PROG
(PARI) A324113(n) = sign(A324100(n)); \\ The rest of program given in A324100.
CROSSREFS
Cf. A324101, A324102 (positions of nonnegative and negative terms).
Sequence in context: A182394 A079054 A131695 * A105812 A134323 A060576
KEYWORD
sign
AUTHOR
Antti Karttunen, Feb 19 2019
STATUS
approved