A329159 2*a(n) are the lengths of record prime gaps immediately preceding twin primes.

1, 2, 3, 5, 6, 11, 14, 15, 17, 20, 24, 26, 30, 35, 39, 42, 45, 50, 66, 68, 74, 75, 89, 98, 104, 107, 117, 123, 144, 159, 165, 180, 183, 192, 195

Offset

1,2

Comments

The corresponding locations are provided in A329158. The gap 2 -> 3 before the pair 3, 5 is excluded.

Links

Table of n, a(n) for n=1..35.

Prog

(PARI) p1=3; p2=5; r=0; forprime(p3=7, 1e9, if(p3-p2==2, d=p2-p1; if(d>r, r=d; print1(d/2, ", "))); p1=p2; p2=p3)

Crossrefs

Cf. A329158, A329160, A329161, A329164, A329165.

Sequence in context: A240218 A347414 A317707 * A350230 A104012 A164830

Adjacent sequences: A329156 A329157 A329158 * A329160 A329161 A329162

Keyword

nonn,more

Author

Hugo Pfoertner, Nov 06 2019

Extensions

a(31)-a(34) from Jinyuan Wang, Mar 01 2020

a(35) from David Trimas, Jul 26 2023

Status

approved