A007642 Numbers k such that 2*k^2 +29 is composite.

29, 30, 32, 35, 39, 44, 50, 57, 58, 61, 63, 65, 72, 74, 76, 84, 87, 88, 89, 91, 92, 94, 95, 97, 99, 102, 107, 109, 113, 116, 118, 120, 122, 123, 125, 126, 127, 134, 138, 144, 145, 146, 147, 148, 149, 150, 153, 154, 156, 157, 163, 164, 165, 166, 169, 174, 175, 179, 180, 182, 183, 185, 187

Offset: 1

Author

N. J. A. Sloane, Mira Bernstein, Robert G. Wilson v

Keywords

• nonn

References

• N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

Programs

PARI

isok(k) = !isprime(2*k^2+29); \\ Michel Marcus, Apr 15 2022

Extensions

More terms from Michel Marcus, Apr 15 2022