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A272813
Nonnegative numbers n such that n^2 - 79n + 1601 is prime.
2
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66
OFFSET
1,3
COMMENTS
80 is the smallest number not in this sequence.
See A005846 for the corresponding primes.
LINKS
Eric Weisstein's World of Mathematics, Prime-Generating Polynomials
EXAMPLE
4 is in this sequence since 4^2 - 79*4 + 1601 = 16-316+1601 = 1301 is prime.
MATHEMATICA
Select[Range[0, 100], PrimeQ[#^2 - 79# + 1601 ] &]
PROG
(PARI) lista(nn) = for(n=0, nn, if(isprime(n^2-79*n+1601), print1(n, ", "))); \\ Altug Alkan, May 06 2016
KEYWORD
nonn
AUTHOR
Robert Price, May 06 2016
STATUS
approved