Position of rightmost 0 (including leading 0) in 2^A031142(n).

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =5a(5) =6a(6) =8a(7) =9a(8) =10a(9) =11a(10) =12a(11) =15a(12) =16a(13) =21a(14) =22a(15) =23a(16) =24a(17) =25a(18) =26a(19) =36a(20) =38a(21) =54a(22) =57a(23) =59a(24) =93a(25) =115a(26) =119a(27) =120a(28) =121a(29) =136