a(n) is the least k such that A345468(k) = 2*n-1.

Terms

a(0) =1a(1) =2a(2) =12a(3) =6a(4) =14a(5) =30a(6) =111a(7) =74a(8) =117a(9) =198a(10) =89a(11) =336a(12) =174a(13) =116a(14) =489a(15) =264a(16) =101a(17) =1251a(18) =2730a(19) =308a(20) =3219a(21) =4836a(22) =1274a(23) =2466a(24) =3999a(25) =1130a(26) =7266a(27) =15571a(28) =440a(29) =3225