The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

Thanks to everyone who made a donation during our annual appeal!
To see the list of donors, or make a donation, see the OEIS Foundation home page.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A176557 Primes of the form 7*x^2 - 5*y^2, where x and y are successive natural numbers. 2
 7, 23, 43, 67, 127, 163, 347, 463, 743, 823, 907, 1087, 1283, 1607, 1723, 2503, 2647, 3767, 3943, 5923, 6143, 6367, 6827, 7547, 8563, 9643, 9923, 11083, 11383, 13267, 14947, 15647, 16363, 17467, 18223, 19387, 20183, 21407, 24847, 25747, 26203 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS a(n) is congruent 3 mod 4. Primes of the form 2x^2+10x-5, x>=1. [From R. J. Mathar and Vincenzo Librandi, Apr 21 2010] LINKS CROSSREFS Cf. A176470 Sequence in context: A031095 A319050 A031371 * A000353 A097149 A185007 Adjacent sequences:  A176554 A176555 A176556 * A176558 A176559 A176560 KEYWORD nonn AUTHOR Giovanni Teofilatto, Apr 20 2010 EXTENSIONS More terms from R. J. Mathar and Vincenzo Librandi, Apr 21 2010 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified January 15 10:26 EST 2021. Contains 340187 sequences. (Running on oeis4.)