login
This site is supported by donations to The OEIS Foundation.
Logo

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A074856 Primes p such that all p-k^2 for p/2 < k^2 < p are composite. 0
2, 5, 13, 17, 31, 37, 61, 79, 89, 97, 109, 127, 139, 193, 229, 277, 307, 311, 313, 349, 373, 379, 401, 409, 439, 457, 499, 541, 569, 571, 577, 653, 661, 691, 701, 709, 751, 811, 823, 829, 877, 991, 1021, 1069, 1087, 1201, 1291, 1381, 1429, 1483, 1549, 1597 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

EXAMPLE

61 is here since the squares between 30 and 61 are 36 and 49 and 61-49 = 12, 61-36 = 25, composites.

CROSSREFS

Sequence in context: A068486 A099332 A031439 * A087952 A124255 A079936

Adjacent sequences:  A074853 A074854 A074855 * A074857 A074858 A074859

KEYWORD

nonn

AUTHOR

Jason Earls (zevi_35711(AT)yahoo.com), Sep 11 2002

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
Recent Additions | More pages | Superseeker | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified February 15 18:22 EST 2012. Contains 205835 sequences.