A141796 Composites of the form n/(prime(n-1) - prime(n-2)).

6, 4, 6, 14, 15, 10, 4, 27, 10, 33, 18, 20, 12, 50, 20, 16, 22, 34, 14, 72, 75, 77, 20, 27, 21, 90, 92, 96, 50, 34, 104, 35, 18, 57, 116, 118, 119, 40, 18, 64, 129, 26, 132, 135, 34, 144, 145, 49, 148, 50, 152, 160, 161, 81, 42, 169, 57, 174, 60, 92, 65, 196, 99, 200, 68, 205

Offset

1,1

Comments

Listed in order of increasing n.

Links

Table of n, a(n) for n=1..66.

Example

For n=12, 12/(prime(12-1)-prime(12-2))=12/(31-29)=6=a(1).
For n=16, 16/(prime(16-1)-prime(16-2))=16/(47-43)=4=a(2).

Maple

for n from 3 to 1000 do c := n/(ithprime(n-1)-ithprime(n-2)) ; if type(c, 'integer') then if not isprime(c) then printf("%d, ", c) ; fi; fi; od: # R. J. Mathar, Aug 03 2009

Crossrefs

Cf. A000040, A001223, A002808.

Sequence in context: A065445 A216184 A164293 * A105160 A353773 A200228

Adjacent sequences: A141793 A141794 A141795 * A141797 A141798 A141799

Keyword

nonn

Author

Juri-Stepan Gerasimov, Sep 15 2008

Extensions

Corrected by R. J. Mathar, Aug 03 2009

Status

approved