A324120 - OEIS

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A324120

Binary weight of SumXOR variant of A297168: a(n) = A000120(A324180(n)).

8

0, 0, 0, 1, 0, 2, 0, 2, 1, 2, 0, 2, 0, 2, 2, 3, 0, 2, 0, 2, 2, 2, 0, 2, 1, 2, 2, 2, 0, 2, 0, 4, 2, 2, 2, 3, 0, 2, 2, 4, 0, 2, 0, 2, 2, 2, 0, 2, 1, 2, 2, 2, 0, 2, 2, 4, 2, 2, 0, 4, 0, 2, 2, 5, 2, 2, 0, 2, 2, 2, 0, 2, 0, 2, 2, 2, 2, 2, 0, 4, 3, 2, 0, 4, 2, 2, 2, 4, 0, 2, 2, 2, 2, 2, 2, 2, 0, 2, 2, 3, 0, 2, 0, 4, 2

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OFFSET

1,6

LINKS

Antti Karttunen, Table of n, a(n) for n = 1..65537

Index entries for sequences computed from indices in prime factorization

FORMULA

a(n) = A000120(A324180(n)).

a(n) <= A324190(n).

a(p^k) = k-1 for all primes p and exponents k >= 1.

PROG

(PARI)

A061395(n) = if(1==n, 0, primepi(vecmax(factor(n)[, 1])));

A297167(n) = if(1==n, 0, (A061395(n) + (bigomega(n)-omega(n)) - 1));

A297112(n) = if(1==n, 0, 2^A297167(n));

A324180(n) = { my(v=0); fordiv(n, d, if(d<n, v = bitxor(v, A297112(d)))); (v); };

A324120(n) = hammingweight(A324180(n));

CROSSREFS

Cf. A000043, A324179, A324180, A324181, A324190, A324191, A324192, A324201.

Sequence in context: A033687 A263452 A133457 * A218857 A260803 A260804

Adjacent sequences: A324117 A324118 A324119 * A324121 A324122 A324123

KEYWORD

nonn

AUTHOR

Antti Karttunen, Feb 19 2019

STATUS

approved