%I #8 Mar 31 2012 10:24:05

%S 1,3,7,15,13,36,127,255,115,123,247,459,1189,13368,23677,35556,11137,

%T 122346,224578,145578,112579,133449,367888,11256777,13334455,1366788,

%U 112234777,234455568,11356789,112334778,1234446778,2244567999

%N Mersenne numbers with digits sorted in increasing order and zeros suppressed.

%C This is to A000225 as A078726 is to A000215. a(n) is prime for n = 2, 3, 5, 7, 15, 27, 29 and which other values?

%F a(n) = A004185(2^n - 1) = 2^n - 1, base 10, with digits sorted in increasing order and zeros suppressed.

%Y Cf. A000215, A000225, A004185, A078726.

%K base,nonn

%O 1,2

%A _Jonathan Vos Post_, Dec 09 2007

%E Offset corrected by _Arkadiusz Wesolowski_, Jun 02 2011