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A175710 Numbers n such that n-4, n and n+4 are all twin semiprimes. 0
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 (list; graph; refs; listen; history; text; internal format)
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: A046706 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

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Last modified April 19 16:49 EDT 2019. Contains 322282 sequences. (Running on oeis4.)