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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A091310 Primes not of the form p*q + p - q with prime p and q. 1
2, 3, 11, 23, 47, 53, 59, 71, 79, 83, 101, 107, 131, 163, 167, 173, 179, 191, 223, 227, 239, 251, 263, 269, 293, 311, 331, 347, 359, 367, 383, 419, 431, 439, 443, 467, 479, 491, 503, 509, 547, 563, 587, 599, 607, 641, 647, 653, 659, 683, 691, 719, 727, 733 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..54.

MATHEMATICA

x = Take[ Select[ Union[ Flatten[ Table[ Prime[p]*Prime[q] + Prime[p] - Prime[q], {p, 116}, {q, 116}]]], PrimeQ[ # ] &], 200]; y = Table[ Prime[i], {i, PrimePi[ p[[ -1]] ]}]; Take[ Complement[y, x], 54] (* Robert G. Wilson v *)

CROSSREFS

Primes not in A091301.

Sequence in context: A040124 A082739 A158017 * A040994 A141123 A263729

Adjacent sequences:  A091307 A091308 A091309 * A091311 A091312 A091313

KEYWORD

nonn

AUTHOR

Zak Seidov, Feb 21 2004

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.

License Agreements, Terms of Use, Privacy Policy. .

Last modified October 22 22:34 EDT 2019. Contains 328335 sequences. (Running on oeis4.)