Position of first occurrence of 2^n in A057923.

Terms

a(0) =2a(1) =1a(2) =3a(3) =6a(4) =9a(5) =15a(6) =27a(7) =36a(8) =51a(9) =87a(10) =135a(11) =243a(12) =315a(13) =531a(14) =735a(15) =969a(16) =1707a(17) =2679a(18) =3831a(19) =6363a(20) =9663a(21) =14559a(22) =23091a(23) =33045a(24) =45999a(25) =77523a(26) =120471a(27) =177639a(28) =252717a(29) =405321