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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

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

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

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Last modified June 27 15:12 EDT 2017. Contains 288790 sequences.