This site is supported by donations to The OEIS Foundation.

"Email this user" was broken Aug 14 to 9am Aug 16. If you sent someone a message in this period, please send it again.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A079721 Interemirp sequence: average of emirp pairs, analogous to interprimes. 0
 15, 24, 34, 51, 72, 76, 88, 102, 110, 131, 153, 162, 173, 189, 255, 324, 342, 353, 374, 545, 705, 721, 736, 741, 747, 756, 765, 838, 922, 939, 947, 960, 969, 977, 987, 1000, 1015, 1026, 1032, 1047, 1065, 1080, 1094, 1100, 1106, 1130, 1152, 1167, 1187 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS M. J. Halm, Sequences FORMULA a(n) = (x(n)+x(n+1))/2 where x(n) is the n-th emirp number EXAMPLE E.g. a(1) = 15 because the first two emirps are 13 and 17 and (13 + 17)/2 = 15 CROSSREFS Cf. A006567, A024675. Sequence in context: A269314 A269316 A081829 * A089952 A240597 A162964 Adjacent sequences:  A079718 A079719 A079720 * A079722 A079723 A079724 KEYWORD nonn,base AUTHOR Michael Joseph Halm, Feb 17 2003 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.