Smallest power of 2 whose decimal expansion contains n.

Terms

a(0) =1024a(1) =1a(2) =2a(3) =32a(4) =4a(5) =256a(6) =16a(7) =32768a(8) =8a(9) =4096a(10) =1024a(12) =128a(13) =131072a(14) =262144a(15) =2097152a(16) =16a(17) =134217728a(18) =1073741824a(19) =8192a(20) =2048a(21) =262144a(24) =1024a(25) =256a(26) =262144a(27) =32768a(28) =128a(29) =4294967296a(30) =4194304a(31) =131072a(32) =32