A165362 Integers of pseudo-averages of at least two consecutive nonprime numbers of the form (a+b+c+..+z)/z, which can be expressed only ones.

3, 4, 8, 9, 18, 21, 23, 24, 38, 42, 43, 50, 55

Offset: 1

Author

Vladimir Joseph Stephan Orlovsky, Sep 16 2009

Keywords

• nonn
• uned

Comments

(4+6+8+9)/9=3, (9+10+12+14+15)/15=4,..

Crossrefs

Cf. A165240

Programs

Mathematica

lst={};Do[a=0;If[ !PrimeQ[q],Do[If[ !PrimeQ[n],m=n;a+=m;e=a/n;If[IntegerQ[e]&&a!=n,If[e<92,AppendTo[lst,e],Break[]]]],{n,q,6000}]],{q,5200}];lst=Sort@lst;lst1={3};lst2={}; Do[If[lst[[n]]==lst[[n+1]]||lst[[n]]==lst[[n-1]],AppendTo[lst2,lst[[n]]],AppendTo[lst1,lst[[n]]]],{n,1,Length[lst]-1,1}]; lst1