A255889 Primes equal to the sum of three successive semiprimes.

19, 73, 107, 163, 233, 271, 719, 733, 839, 1129, 1187, 1231, 1597, 1693, 1733, 1777, 1847, 1871, 2053, 2137, 2287, 2423, 2521, 2543, 2593, 2677, 2719, 2843, 3217, 3229, 3257, 3491, 3623, 3659, 3853, 4019, 4027, 4219, 4231, 4243, 4441, 4591

Offset

1,1

Links

Zak Seidov, Table of n, a(n) for n = 1..1000

Example

19 = 4+6+9 = A001358(1)+A001358(2)+A001358(3);
73 = 22+25+26 = A001358(8)+A001358(9)+A001358(10).

Mathematica

Select[Apply[Plus, Partition[Select[Range@ 1500, PrimeOmega[#] == 2 &], 3, 1], {1}], PrimeQ] (* Michael De Vlieger, Mar 10 2015 *)

Crossrefs

Cf. A001358, A108183.

Sequence in context: A127874 A289817 A321343 * A154406 A141960 A178541

Adjacent sequences: A255886 A255887 A255888 * A255890 A255891 A255892

Keyword

nonn

Author

Zak Seidov, Mar 09 2015

Status

approved