A256376 Primes of the form 10n^2 - 90n + 163.

23, 83, 163, 263, 383, 523, 683, 863, 1063, 1283, 1523, 1783, 2063, 2683, 3023, 4583, 5023, 5483, 6983, 7523, 8663, 9883, 11863, 14783, 16363, 17183, 19763, 20663, 25463, 29663, 30763, 31883, 33023, 34183, 35363, 36563, 37783, 39023, 40283, 42863, 45523, 49663, 56963, 61583, 64763

Offset: 1

Author

Avi Friedlich, Mar 27 2015

Keywords

• nonn
• easy

Links

• Charles R Greathouse IV, Table of n, a(n) for n = 1..10000

Programs

Magma

[ a: k in [7..200] | IsPrime(a) where a is 10*k^2-90*k+163];

Mathematica

Select[Table[10 k^2 - 90 k + 163, {k, 7, 600}], PrimeQ]

PARI

select(isprime, vector(100,n,10*n^2 + 30*n - 17)) \\ Charles R Greathouse IV, Mar 27 2015

Extensions

Corrected by Vincenzo Librandi, Mar 27 2015