login
a(n) is the lower end of a record gap A349995(n) between consecutive odd squarefree semiprimes (A046388).
4

%I #16 Mar 01 2024 01:45:54

%S 15,21,95,267,2369,6559,8817,13705,15261,21583,35981,66921,113009,

%T 340891,783757,872219,3058853,3586843,5835191,12345473,108994623,

%U 248706917,268749691,679956119,709239621,3648864859,3790337723,4171420481,33955869693,34279038379,34840796369

%N a(n) is the lower end of a record gap A349995(n) between consecutive odd squarefree semiprimes (A046388).

%H Lucas A. Brown, <a href="/A350098/b350098.txt">Table of n, a(n) for n = 1..41</a> (first 34 terms from Hugo Pfoertner)

%H Lucas A. Brown, <a href="https://github.com/lucasaugustus/oeis/blob/main/A349995.py">Python program</a>.

%F a(n) = A350099(n) - A349995(n).

%e See A349995.

%Y Cf. A046388, A085809, A341828, A349995, A350099.

%Y Starting at a(3)=95 the terms coincide with the known terms of A114057.

%K nonn

%O 1,1

%A _Hugo Pfoertner_, Dec 26 2021