Sum of terms in row n of A081532.

Terms

a(0) =1a(1) =3a(2) =7a(3) =12a(4) =31a(5) =28a(6) =127a(7) =60a(8) =91a(9) =124a(10) =2047a(11) =168a(12) =8191a(13) =508a(14) =403a(15) =360a(16) =131071a(17) =546a(18) =524287a(19) =744a(20) =1651a(21) =8188a(22) =8388607a(23) =1170a(24) =3751a(25) =32764a(26) =2821a(27) =3048a(28) =536870911a(29) =2418