A141608 Nonprimes of the form n-(p(n+2)-p(n-1))/(p(n+1)-p(n)), where p(n)=n-th prime.

0, 4, 8, 9, 10, 14, 16, 18, 20, 21, 24, 25, 26, 30, 32, 34, 35, 36, 42, 44, 49, 50, 52, 56, 58, 60, 62, 68, 70, 74, 78, 81, 82, 84, 88, 92, 102, 104, 108, 110, 112, 114, 120, 121, 125, 128, 130, 133, 134, 135, 136, 141, 142, 143, 144, 146, 147, 162, 164, 165, 168, 169, 171, 175

Offset

1,2

Comments

Entries are not repeated and shown in natural order.

Links

Table of n, a(n) for n=1..64.

Example

n=3: 3-(11-3)/(7-5)=-1 negative, discarded.
n=5: 5-(17-7)/(13-11)=0=a(1).
n=6: 6-(19-11)/(17-13)=4=a(2).
n=11: 11-(41-29)/(37-31)=9=a(4).
n=12: 12-(43-31)/(41-37)=9=a(4).
n=13: 13-(47-37)/(43-41)=8=a(3).

Crossrefs

Cf. A000040, A141468.

Sequence in context: A125493 A341615 A164923 * A367768 A243176 A094906

Adjacent sequences: A141605 A141606 A141607 * A141609 A141610 A141611

Keyword

nonn

Author

Juri-Stepan Gerasimov, Sep 10 2008

Extensions

Corrected and extended by R. J. Mathar, Sep 26 2008

Status

approved