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URL: https://oeis.org/A165737

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A165737
Positive integers n such that the sum of decimal digits of (16^n-1) is divisible by n.
0
1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 13, 14, 17, 18, 23, 37, 43, 46, 60, 119, 183, 223
OFFSET
1,2
COMMENTS
Comparing with A165722 there is one additional term a(8)=9.
No other terms below 10^5.
PROG
(PARI) isok(n) = (sumdigits(16^n-1) % n) == 0; \\ Michel Marcus, Oct 16 2013
CROSSREFS
Cf. A165722.
Sequence in context: A063949 A073518 A144769 * A349996 A347517 A358992
KEYWORD
base,more,nonn
AUTHOR
Zak Seidov, Sep 25 2009
STATUS
approved