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A177768
Positions of decreases in sequence A061712 (related to Hamming weights of primes).
2
7, 15, 23, 31, 39, 63, 79, 95, 127, 175, 207, 255, 511, 543, 607, 767, 1023, 1279, 2047, 4095, 4423, 5135
OFFSET
1,1
COMMENTS
Is the sequence infinite?
All terms listed are of the form == 7 (mod 8). Is there a reason for this phenomenon?
Conjecture: The numbers 2^k-1 for k > 2 are terms. - Chai Wah Wu, Sep 02 2021
FORMULA
{n : A061712(n) < A061712(n-1)}.
CROSSREFS
Cf. A061712.
Sequence in context: A004771 A029724 A194400 * A243582 A336819 A056828
KEYWORD
nonn,more,base
AUTHOR
Vladimir Shevelev, May 13 2010
EXTENSIONS
a(20)-a(22) from Chai Wah Wu, Sep 06 2021
STATUS
approved