login
A224859
Numbers n such that 90*n + 47 and 90*n + 49 are twin primes.
1
1, 2, 9, 16, 18, 22, 29, 38, 39, 43, 50, 51, 87, 95, 107, 108, 109, 111, 121, 123, 134, 137, 143, 144, 155, 160, 162, 176, 178, 193, 195, 199, 200, 227, 230, 233, 237, 239, 240, 241, 247, 248, 251, 261, 262, 277, 304, 314, 324, 326, 328, 338, 339, 352, 363, 370
OFFSET
1,2
COMMENTS
All matching entries for A201734 and A201818 are twin primes.
LINKS
FORMULA
A201734 intersect A201818.
MATHEMATICA
Select[Range[0, 499], PrimeQ[90# + 47] && PrimeQ[90# + 49] &] (* copied from: Alonso del Arte, Jul 22 2013 *)
Select[Range[500], AllTrue[90#+{47, 49}, PrimeQ]&] (* The program uses the AllTrue function from Mathematica version 10 *) (* Harvey P. Dale, Oct 18 2015 *)
CROSSREFS
Sequence in context: A083783 A162614 A031238 * A136345 A017005 A131189
KEYWORD
nonn
AUTHOR
J. W. Helkenberg, Jul 22 2013
STATUS
approved