%N Primorial deflation of A019505(n), where A019505(n) is smallest number with same number of divisors as 2*A019505(n-1), starting from A019505(1) = 1.
%C a(n) is the unique integer k such that A108951(k) = A019505(n).
%C Conjectured to be a subsequence of A329902.
%C Terms computed from b-file of A019505 provided by _R. J. Mathar_.
%F a(n) = A329900(A019505(n)).
%o (PARI) A330745(n) = A329900(A019505(n));
%Y Cf. A019505, A108951, A329900, A329902.
%Y Cf. A330744 (conjectured subsequence).
%A _Antti Karttunen_, Jan 10 2020