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A229624
Positive integers n for which the length of shortest addition-subtraction chain is smaller than the length of shortest addition chain, i.e., A128998(n) < A003313(n).
1
31, 47, 62, 63, 71, 79
OFFSET
1,1
CROSSREFS
Sequence in context: A014313 A095318 A130096 * A270781 A075586 A033221
KEYWORD
nonn,more,hard
AUTHOR
Max Alekseyev, Sep 27 2013
STATUS
approved