A074856 Primes p such that all p-k^2 for p/2 < k^2 < p are composite.

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

Offset

1,1

Links

Table of n, a(n) for n=1..52.

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: A099332 A279687 A031439 * A087952 A124255 A293173

Adjacent sequences: A074853 A074854 A074855 * A074857 A074858 A074859

Keyword

nonn

Author

Jason Earls, Sep 11 2002

Status

approved