A132457 Composites of the form ((x+y)/3+2)/(x-y), where x and y are prime.

4, 8, 12, 14, 18, 22, 28, 33, 38, 39, 52, 64, 74, 77, 78, 82, 84, 108, 113, 124, 129, 138, 143, 144, 147, 148, 152, 162, 169, 182, 183, 203, 214, 217, 218, 238, 242, 248, 249, 259, 262, 264, 267, 278, 298, 312, 333, 334, 348, 357, 368, 374, 392, 399, 407, 413

Offset

1,1

Links

Table of n, a(n) for n=1..56.

Example

If x=23 and y=19, then ((23+19)/3+2)/(23-19)=16/4=4=a(1).
If x=47 and y=43, then ((47+43)/3+2)/(47-43)=32/4=8=a(2).
If x=71 and y=67, then ((71+67)/3+2)/(71-67)=48/4=12=a(3).
If x=83 and y=79, then ((83+79)/3+2)/(83-79)=72/4=18=a(4).
If x=107 and y=103, then ((107+1103)/3+2)/(107-103)=88/4=22=a(5).
If x=131 and y=127, then ((131+127)/3+2)/(131-127)=112/4=28=a(6),
etc.

Crossrefs

Cf. A000040, A002808, A141468.

Sequence in context: A257221 A092453 A285374 * A311080 A316360 A311081

Adjacent sequences: A132454 A132455 A132456 * A132458 A132459 A132460

Keyword

nonn,less

Author

Juri-Stepan Gerasimov, Aug 28 2008

Extensions

Corrected omission in Examples section. - Dan Graham (dan.a.graham(AT)hotmail.co.uk), Apr 11 2010

Status

approved