|
| |
|
|
A089238
|
|
Numbers n such that 3*n^2/2 - 1 is a prime.
|
|
0
|
|
|
|
2, 4, 6, 10, 14, 16, 20, 24, 26, 34, 40, 44, 54, 56, 60, 64, 70, 76, 86, 90, 104, 110, 116, 120, 124, 126, 130, 136, 140, 146, 150, 154, 164, 166, 174, 186, 194, 200, 204, 230, 240, 244, 260, 264, 286, 300, 306, 336, 346, 354, 374, 386, 394, 400, 414, 416, 420
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
1,1
|
|
|
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
|
|
|
LINKS
|
Table of n, a(n) for n=1..57.
|
|
|
PROG
|
(PARI) forstep(n=2, 1000, 2, if(isprime(3*n^2/2-1), print1(n, ", "))) - Rick L. Shepherd, May 06 2008
|
|
|
CROSSREFS
|
Cf. A090686.
Sequence in context: A075574 A104692 A066755 * A005574 A109807 A191113
Adjacent sequences: A089235 A089236 A089237 * A089239 A089240 A089241
|
|
|
KEYWORD
|
nonn
|
|
|
AUTHOR
|
Giovanni Teofilatto, Dec 22 2003
|
|
|
EXTENSIONS
|
Corrected and extended by Rick L. Shepherd, May 06 2008
|
|
|
STATUS
|
approved
|
| |
|
|
