A288955 Integers that are the sum of two consecutive semiprimes, as well as the product of two consecutive semiprimes.

24, 1482, 2805, 3596, 7917, 12765, 17157, 17822, 21170, 25122, 29913, 36278, 42230, 45582, 58539, 61503, 62997, 109886, 117986, 145542, 258055, 264710, 268323, 272994, 281957, 294306, 306362, 319790, 324318, 387506, 491397, 599838, 613085, 656091, 679758, 709806, 771762, 793877

Offset

1,1

Links

Table of n, a(n) for n=1..38.

Example

24 = A118717(4) = A108215(1), 1482 = A118717(223) = A108215(14).

Mathematica

s = Partition[Select[Range[10^6], PrimeOmega@ # == 2 &], 2, 1]; Intersection[Map[Total, s], Map[Times @@ # &, s]] (* Michael De Vlieger, Jun 21 2017 *)

Crossrefs

Cf. A001358. Intersection of A118717 and A108215.

Sequence in context: A260784 A099060 A035174 * A203973 A063885 A019284

Adjacent sequences: A288952 A288953 A288954 * A288956 A288957 A288958

Keyword

nonn

Author

Zak Seidov, Jun 20 2017

Extensions

More terms from Michel Marcus, Jun 27 2017

Status

approved