Exponent of the least power of 2 having exactly n zeros in its decimal representation.

Terms

a(0) =0a(1) =10a(2) =42a(3) =43a(4) =79a(5) =88a(6) =100a(7) =102a(8) =189a(9) =198a(10) =242a(11) =250a(12) =252a(13) =263a(14) =305a(15) =262a(16) =370a(17) =306a(18) =368a(19) =383a(20) =447a(21) =464a(22) =496a(23) =672a(24) =466a(25) =557a(26) =630a(27) =629a(28) =628a(29) =654