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1,2
Rows of A114000 expressed as decimals.
Table of n, a(n) for n=1..31.
a(5)=25 converts to 11001 in binary, which has sum of digits equal to 3.
9=2*5-1 has 3 divisors.
Cf. A099774.
Sequence in context: A006722 A251413 A039774 * A171879 A171877 A004044
Adjacent sequences: A113998 A113999 A114000 * A114002 A114003 A114004
easy,nonn
Paul Barry, Nov 12 2005
approved