A180941 Numbers n such that n^2 - 2999n + 2248541 is semiprime.

2, 3, 4, 8, 10, 13, 14, 15, 19, 20, 22, 23, 24, 25, 28, 29, 30, 31, 32, 36, 37, 41, 42, 44, 45, 48, 49, 52, 58, 61, 64, 66, 68, 72, 73, 74, 78, 81, 83, 85, 87, 90, 93, 94, 95, 96, 101, 102, 104, 105, 106, 108, 109, 110, 111, 112, 114, 116, 118, 122, 124, 127, 128, 129, 130

Offset

1,1

References

Albert H. Beiler, Recreations in the Theory of Numbers, New York: Dover, 1966. Page 220.

Links

Table of n, a(n) for n=1..65.

Mathematica

Select[Range[200], PrimeOmega[#^2-2999#+2248541]==2&] (* Harvey P. Dale, Aug 12 2013 *)

Crossrefs

Sequence in context: A121612 A061193 A346971 * A190896 A365018 A135772

Adjacent sequences: A180938 A180939 A180940 * A180942 A180943 A180944

Keyword

easy,nonn

Author

Jason Earls, Sep 27 2010

Status

approved