|
| |
|
|
A090697
|
|
Numbers n such that n^2/2 - 1 is a prime.
|
|
4
| |
|
|
4, 6, 8, 12, 14, 16, 20, 22, 26, 30, 34, 36, 42, 44, 48, 50, 56, 68, 72, 76, 78, 82, 84, 86, 90, 92, 98, 100, 104, 112, 118, 124, 126, 128, 138, 146, 152, 160, 162, 170, 174, 182, 184, 190, 196, 204, 216, 218, 224, 226, 230, 236, 250, 252, 254, 264, 268, 274, 280
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,1
|
|
|
COMMENTS
| A066436 gives resulting primes p such that 2p+2 is square. - Chandler
|
|
|
REFERENCES
| M. Cerasoli, F. Eugeni and M. Protasi, Elementi di Matematica Discreta, Bologna 1988
Emanuele Munarini and Norma Zagaglia Salvi, Matematica Discreta,UTET, CittaStudiEdizioni, Milano 1997
|
|
|
FORMULA
| a(n) = 2*A066049(n) = A110558(n)/2. - Chandler
|
|
|
CROSSREFS
| Cf. A066049, A066436, A091176, A110558.
Sequence in context: A110606 A117247 A047407 * A107303 A028876 A053579
Adjacent sequences: A090694 A090695 A090696 * A090698 A090699 A090700
|
|
|
KEYWORD
| easy,nonn
|
|
|
AUTHOR
| Giovanni Teofilatto (g.teofilatto(AT)tiscalinet.it), Dec 20 2003
|
|
|
EXTENSIONS
| Corrected and extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), Dec 25 2003
|
| |
|
|
