A162471 Prime divisors of {n^2+n+1} which do not occur in A002383.

19, 37, 61, 67, 79, 97, 103, 109, 127, 139, 151, 163, 181, 193, 199, 223, 229, 271, 277, 283, 313, 331, 337, 349, 367, 373, 379, 397, 409, 433, 439, 457, 487, 499, 523, 541, 547, 571, 577, 607, 613, 619, 631, 643, 661, 673, 691, 709, 727, 733, 739, 751, 769, 787, 811, 823, 829

Offset

1,1

Links

Table of n, a(n) for n=1..57.

Example

The first prime divisor of {n^2+n+1} which is not an element of the sequence A002383 is 19. 7^2+7+1 = 57 = 19*3.

Crossrefs

Cf. A002383.

Sequence in context: A161705 A131600 A175546 * A124268 A339860 A259648

Adjacent sequences: A162468 A162469 A162470 * A162472 A162473 A162474

Keyword

nonn

Author

Daniel Tisdale, Jul 04 2009

Extensions

More terms from Michel Marcus, Aug 16 2022

Status

approved