Smallest k such that A257743(k)=n.

Terms

a(0) =1a(1) =9a(2) =33a(3) =135a(4) =183a(5) =143a(6) =95a(7) =63a(8) =1349a(9) =899a(10) =1535a(11) =1023a(12) =4623a(13) =7047a(14) =18063a(15) =14623a(16) =12543a(17) =16383a(18) =23849a(19) =15899a(20) =10599a(21) =29639a(22) =79037a(23) =80351a(24) =53567a(25) =35711a(26) =23807a(27) =15871a(28) =21161a(29) =56429