Partial sums of A130752.

Terms

a(0) =2a(1) =7a(2) =16a(3) =32a(4) =63a(5) =126a(6) =254a(7) =511a(8) =1024a(9) =2048a(10) =4095a(11) =8190a(12) =16382a(13) =32767a(14) =65536a(15) =131072a(16) =262143a(17) =524286a(18) =1048574a(19) =2097151a(20) =4194304a(21) =8388608a(22) =16777215a(23) =33554430a(24) =67108862a(25) =134217727a(26) =268435456a(27) =536870912a(28) =1073741823a(29) =2147483646