|
Search: id:A039949
|
|
|
| A039949 |
|
Primes of form 30n-13. |
|
+0
24
|
|
| 17, 47, 107, 137, 167, 197, 227, 257, 317, 347, 467, 557, 587, 617, 647, 677, 797, 827, 857, 887, 947, 977, 1097, 1187, 1217, 1277, 1307, 1367, 1427, 1487, 1607, 1637, 1667, 1697, 1787, 1847, 1877, 1907, 1997, 2027, 2087, 2207, 2237, 2267, 2297, 2357, 2417
(list; graph; listen)
|
|
|
OFFSET
|
1,1
|
|
|
COMMENT
|
This linear form produces the most primes for n between 1 and 1000 (411/ 1000)
Primes congruent to 17 (mod 30). - O. E. Pol (info(AT)polprimos.com), Aug 15, 2007.
Also, for many prime numbers, a(n)=15*n^2+15*n+17 [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Jan 28 2009]
Primes ending in 7 with (SOD-1)/3 non-integer where SOD is sum of digits. - Ki Punches
|
|
REFERENCES
|
C. Clawson, Mathematical Mysteries, Plenum Press, 1996, p. 173
|
|
LINKS
|
O. E. Pol, Determinacion geometrica de los numeros primos y perfectos.
|
|
FORMULA
|
a(n) = A158648(n)*30 + 17. - Chandler
Intersection of A030432 and A007528. - Chandler
|
|
CROSSREFS
|
Cf. A132230-A132236.
Sequence in context: A128468 A031374 A061722 this_sequence A155841 A147058 A083296
Adjacent sequences: A039946 A039947 A039948 this_sequence A039950 A039951 A039952
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Felice Russo (felice.russo(AT)katamail.com)
|
|
EXTENSIONS
|
Extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), Apr 07 2009
|
|
|
Search completed in 0.002 seconds
|
