Least k such that A020952(k) = n.

Terms

a(0) =1a(1) =0a(2) =2a(3) =4a(4) =8a(5) =16a(6) =10a(7) =64a(8) =18a(9) =22a(10) =20a(11) =1024a(12) =38a(13) =36a(14) =40a(15) =70a(16) =44a(17) =42a(18) =72a(19) =132a(20) =142a(21) =76a(22) =74a(23) =88a(24) =86a(25) =82a(26) =90a(27) =138a(28) =84a(29) =156