# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/ Search: id:a178565 Showing 1-1 of 1 %I A178565 #3 Oct 28 2021 13:09:16 %S A178565 189111589,316283205,340596403,1363676123,2288631107,2548484492, %T A178565 3761774969,5693215546,5806904514,5983441966,6153368797,6435606987, %U A178565 6909440949,6955203039,7216006868,7582600736,7657322028,9403678002 %N A178565 Numbers n for which the set {210*n-19, 210*n-17, 210*n-13, 210*n-11, 210*n-1, 210*n+1, 210*n+11, 210*n+13, 210*n+17, 210*n+19} forms a symmetrical prime decuplet (also known as Federighi cluster). %C A178565 n is always +/- 4 (mod 11). %H A178565 Thomas R. Nicely, Dense prime clusters %Y A178565 Cf. A145315 %K A178565 nonn %O A178565 1,1 %A A178565 _Andrey V. Kulsha_, May 29 2010 # Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE