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%I #2 Mar 30 2012 17:23:31
%S 0,3,7,12,31,24,127,48,56,96,2047,99,8191,384,224,195,131071,199,
%T 524287,387,896,6144,8388607,391,992,24576,455,1539,536870911,775
%N a(n) = Smallest number with binary run length product = n
%C a(p) = 2^p - 1 for prime p
%e a(4) = 12, because 12 is the smallest number with a binary run length product of 4.
%e 12 decimal = 1100 binary. Run lengths in binary are 2,2, and 2x2 = 4.
%Y Cf. A167489 - Product of run length in binary representation of n
%Y Cf. A167491 - Numbers in this sequence sorted in ascending order
%K nonn
%O 1,2
%A _Andrew Weimholt_, Nov 05 2009