A175710 Numbers n such that n-4, n and n+4 are all twin semiprimes.

10, 91, 115, 119, 205, 209, 213, 217, 291, 295, 299, 305, 323, 407, 411, 485, 489, 493, 497, 501, 515, 533, 685, 699, 703, 717, 749, 767, 785, 789, 803, 917, 955, 989, 1007, 1077, 1115, 1137, 1141, 1145, 1195, 1199, 1203, 1207, 1257, 1267, 1333, 1343, 1347

Offset

1,1

Links

Table of n, a(n) for n=1..49.

Example

a(1)=10 because 10-4=6, 10 and 10+4=14 are all twin semiprimes.

Crossrefs

Cf. A175612, A175648, A175664.

Sequence in context: A337867 A116348 A043088 * A226389 A119047 A143572

Adjacent sequences: A175707 A175708 A175709 * A175711 A175712 A175713

Keyword

nonn

Author

Juri-Stepan Gerasimov, Aug 12 2010

Extensions

Corrected (299, 411 etc inserted) by R. J. Mathar, Aug 13 2010

Status

approved