A254712 Semiprimes that are the sum of five successive semiprimes.

69, 82, 166, 417, 451, 545, 614, 679, 717, 731, 763, 779, 799, 813, 851, 1047, 1057, 1077, 1101, 1119, 1138, 1262, 1293, 1346, 1371, 1603, 1639, 1651, 1678, 1739, 1761, 1817, 1897, 1959, 1983, 2049, 2078, 2177, 2263, 2446, 2498, 2533, 2661, 2705, 2734, 2746, 2762

Offset: 1

Author

Zak Seidov, Feb 06 2015

Keywords

• nonn

Examples

			69=A001358(24)=A001358(3)+...+A001358(7)= 9 + 10 + 14 + 15 + 21,
82=A001358(27)=A001358(4)+...+A001358(8)= 10 + 14 + 15 + 21 + 22.
		

Links

• Zak Seidov, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A001358, A092192, A131610, A158339.

Programs

Mathematica

Module[{sps=Select[Range[750],PrimeOmega[#]==2&]},Select[Total/@ Partition[ sps,5,1],PrimeOmega[ #] ==2&]] (* Harvey P. Dale, Nov 11 2021 *)