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A332813 a(n) = A048675(n) mod 3. 6
0, 1, 2, 2, 1, 0, 2, 0, 1, 2, 1, 1, 2, 0, 0, 1, 1, 2, 2, 0, 1, 2, 1, 2, 2, 0, 0, 1, 2, 1, 1, 2, 0, 2, 0, 0, 2, 0, 1, 1, 1, 2, 2, 0, 2, 2, 1, 0, 1, 0, 0, 1, 2, 1, 2, 2, 1, 0, 1, 2, 2, 2, 0, 0, 0, 1, 1, 0, 0, 1, 2, 1, 1, 0, 1, 1, 0, 2, 2, 2, 2, 2, 1, 0, 2, 0, 1, 1, 2, 0, 1, 0, 0, 2, 0, 1, 1, 2, 2, 1, 2, 1, 1, 2, 2 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
COMMENTS
Completely additive modulo 3.
See comments in A332823 which is 0,+1,-1 version of this sequence.
LINKS
FORMULA
a(n) = A010872(A048675(n)).
a(A332461(n)) = a(A332462(n)) = A329903(n).
PROG
(PARI) A332813(n) = { my(f = factor(n)); (sum(k=1, #f~, f[k, 2]*2^primepi(f[k, 1]))/2)%3; };
CROSSREFS
Cf. A332823 (for 0,+1,-1 version of this sequence).
Cf. A332820, A332821, A332822 for positions of 0's, 1's and 2's in this sequence.
Cf. also A329903.
Sequence in context: A153241 A306863 A334108 * A323077 A334201 A257400
KEYWORD
nonn
AUTHOR
Antti Karttunen, Mar 01 2020
STATUS
approved

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Last modified April 23 09:22 EDT 2024. Contains 371905 sequences. (Running on oeis4.)