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A336692
Binary weight of 1+sigma(n).
8
1, 1, 2, 1, 3, 3, 2, 1, 3, 3, 3, 4, 4, 3, 3, 1, 3, 2, 3, 4, 2, 3, 3, 5, 1, 4, 3, 4, 5, 3, 2, 1, 3, 5, 3, 4, 4, 5, 4, 5, 4, 3, 4, 4, 5, 3, 3, 6, 4, 5, 3, 4, 5, 5, 3, 5, 3, 5, 5, 4, 6, 3, 4, 1, 4, 3, 3, 7, 3, 3, 3, 3, 4, 5, 6, 4, 3, 4, 3, 6, 5, 7, 4, 4, 5, 3, 5, 5, 5, 6, 4, 4, 2, 3, 5, 7, 4, 4, 5, 5, 5, 5, 4, 5, 3
OFFSET
1,3
FORMULA
a(n) = A000120(1+A000203(n)) = A000120(A088580(n)) = A000120(A332459(n)).
PROG
(PARI) A336692(n) = hammingweight(1+sigma(n));
KEYWORD
nonn
AUTHOR
Antti Karttunen, Jul 31 2020
STATUS
approved