A350099 a(n) is the upper end of a record gap A349995(n) between consecutive odd squarefree semiprimes (A046388).

21, 33, 111, 287, 2391, 6583, 8843, 13733, 15293, 21619, 36019, 66961, 113053, 340941, 783809, 872279, 3058917, 3586913, 5835265, 12345557, 108994713, 248707009, 268749791, 679956221, 709239737, 3648864977, 3790337843, 4171420613, 33955869829, 34279038517, 34840796509

Offset

1,1

Links

Lucas A. Brown, Table of n, a(n) for n = 1..41 (first 34 terms from Hugo Pfoertner)

Lucas A. Brown, Python program.

Formula

a(n) = A350098(n) + A349995(n).

Example

See A349995.

Crossrefs

Cf. A046388, A085809, A114057, A341828, A349995, A350098.

Sequence in context: A033901 A033656 A270074 * A032792 A146902 A146910

Adjacent sequences: A350096 A350097 A350098 * A350100 A350101 A350102

Keyword

nonn

Author

Hugo Pfoertner, Dec 26 2021

Status

approved