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

Terms

a(0) =1a(1) =3a(2) =7a(3) =15a(4) =13a(5) =36a(6) =127a(7) =255a(8) =115a(9) =123a(10) =247a(11) =459a(12) =1189a(13) =13368a(14) =23677a(15) =35556a(16) =11137a(17) =122346a(18) =224578a(19) =145578a(20) =112579a(21) =133449a(22) =367888a(23) =11256777a(24) =13334455a(25) =1366788a(26) =112234777a(27) =234455568a(28) =11356789a(29) =112334778