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A325635
a(n) = A091255(2n, sigma(n)).
7
1, 1, 2, 1, 6, 12, 2, 1, 1, 6, 2, 4, 2, 4, 6, 1, 6, 3, 2, 2, 2, 4, 6, 12, 1, 2, 10, 56, 6, 12, 2, 1, 6, 10, 2, 1, 2, 4, 2, 10, 2, 4, 2, 4, 10, 12, 2, 4, 1, 1, 6, 2, 6, 20, 2, 8, 10, 6, 2, 8, 2, 4, 2, 1, 42, 12, 2, 6, 2, 28, 6, 9, 2, 2, 2, 4, 6, 4, 2, 2, 1, 2, 14, 56, 10, 12, 2, 4, 6, 2, 2, 8, 2, 4, 10, 12, 2, 1, 10, 1, 6, 20, 2, 2, 6
OFFSET
1,3
FORMULA
a(n) = A091255(2n, A000203(n)).
a(n) = A091255(2n, A318467(n)) = A091255(A000203(n), A318467(n)).
PROG
(PARI)
A091255sq(a, b) = fromdigits(Vec(lift(gcd(Pol(binary(a))*Mod(1, 2), Pol(binary(b))*Mod(1, 2)))), 2);
A325635(n) = A091255sq(n+n, sigma(n));
CROSSREFS
Cf. A000203, A091255, A318467, A325634, A325636, A325638 (n such that a(n) = 2n).
Sequence in context: A113216 A303986 A342589 * A375753 A081064 A350749
KEYWORD
nonn
AUTHOR
Antti Karttunen, May 21 2019
STATUS
approved