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 A072572 Odd interprimes divisible by 3. 12
 9, 15, 21, 39, 45, 69, 81, 93, 99, 105, 111, 129, 165, 195, 225, 231, 279, 309, 315, 351, 363, 381, 393, 399, 405, 441, 453, 459, 465, 483, 489, 495, 501, 615, 645, 675, 687, 705, 723, 741, 747, 759, 765, 771, 825, 855, 861, 879, 885, 897, 909, 915, 933 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Harvey P. Dale, Table of n, a(n) for n = 1..1000 MATHEMATICA a = Table[ Prime[n], {n, 2, 200}]; b = {}; Do[d = (a[[n + 1]] - a[[n]])/2; If[ OddQ[a[[n]] + d] && Mod[d, 3] != 0, b = Append[b, a[[n]] + d]], {n, 1, 198}]; b Select[Mean/@Partition[Prime[Range[4, 200]], 2, 1], OddQ[#]&&Divisible[ #, 3]&] (* Harvey P. Dale, Oct 29 2013 *) CROSSREFS Cf. A072569, A072573, A024675. Sequence in context: A241809 A063174 A072569 * A029708 A125215 A102739 Adjacent sequences:  A072569 A072570 A072571 * A072573 A072574 A072575 KEYWORD nonn AUTHOR Marco Matosic, Jun 25 2002 EXTENSIONS Edited by N. J. A. Sloane and Robert G. Wilson v, Jun 27 2002 Corrected by T. D. Noe, Nov 01 2006 STATUS approved

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Last modified April 5 10:33 EDT 2020. Contains 333239 sequences. (Running on oeis4.)