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A154563 Averages of twin prime pairs of A074378. 1
18, 60, 138, 150, 1278, 1620, 2730, 4128, 6360, 11718, 13398, 17490, 20808, 23028, 28308, 29670, 51870, 61380, 69828, 73848, 78540, 92568, 97500, 115770, 138570, 166668, 176610, 193380, 200928, 258318, 304980, 430008, 500910, 518760, 536190 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

18-1=17;18+1=19,...

LINKS

Table of n, a(n) for n=1..35.

MATHEMATICA

q=2; lst={}; s=0; Do[s+=n/q; If[Floor[s]==s, If[PrimeQ[s-1]&&PrimeQ[s+1], AppendTo[lst, s]]], {n, 0, 8!}]; lst

CROSSREFS

Sequence in context: A056438 A218617 A105521 * A325043 A090073 A327089

Adjacent sequences:  A154560 A154561 A154562 * A154564 A154565 A154566

KEYWORD

nonn

AUTHOR

Vladimir Joseph Stephan Orlovsky, Jan 12 2009

STATUS

approved

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Last modified September 26 01:25 EDT 2020. Contains 337346 sequences. (Running on oeis4.)