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A089362 Numbers n such that n^2 - 5n + 5 is prime. 0
5, 6, 7, 8, 9, 11, 12, 13, 14, 16, 19, 22, 23, 24, 27, 29, 33, 34, 38, 41, 42, 44, 47, 48, 49, 51, 53, 56, 57, 58, 59, 62, 63, 67, 71, 73, 79, 86, 88, 89, 92, 96, 97, 99, 103, 104, 106, 117, 118, 123, 128, 129, 133, 134, 137, 141, 143 (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.

FORMULA

a(n) = A002328(n)+2.

PROG

(PARI) is(n)=isprime(n^2-5*n+5) \\ Charles R Greathouse IV, Jun 13 2017

CROSSREFS

Cf. A002328.

Sequence in context: A023379 A003667 A138469 * A121537 A285219 A047577

Adjacent sequences:  A089359 A089360 A089361 * A089363 A089364 A089365

KEYWORD

easy,nonn

AUTHOR

Giovanni Teofilatto, Dec 27 2003

STATUS

approved

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Last modified January 24 07:18 EST 2020. Contains 331189 sequences. (Running on oeis4.)