A356769 Semiprime gaps (A065516) in the order of first occurrences.

2, 3, 1, 4, 6, 7, 5, 11, 9, 8, 10, 14, 13, 12, 19, 15, 17, 20, 16, 18, 24, 22, 21, 25, 28, 27, 30, 32, 38, 23, 31, 26, 36, 35, 34, 29, 47, 33, 40, 41, 54, 50, 43, 55, 39, 48, 37, 42, 45, 44, 53, 70, 46, 56, 74, 52, 62, 51, 66, 49, 58, 68, 59, 63, 67, 60, 57, 61, 72, 64, 65, 76, 69, 73, 75, 82, 85

Offset: 1

Author

Zak Seidov, Aug 27 2022

Keywords

• nonn

Crossrefs

Cf. A065516, A001358.

Programs

Mathematica

s={2};n=6;Do[m=n+1;While[PrimeOmega[m]!= 2,m++];If[FreeQ[s,m-n],AppendTo[s,m-n];Print[{n,m-n}]];n=m,{10^8}];s