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 A137389 a(n) = 2^(prime(n)) + 2^(prime(n + 1)) 1
 12, 40, 160, 2176, 10240, 139264, 655360, 8912896, 545259520, 2684354560, 139586437120, 2336462209024, 10995116277760, 149533581377536, 9147936743096320, 585467951558164480, 2882303761517117440, 149879795598890106880, 2508757194024499019776, 11805916207174113034240 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS FORMULA a(n)=A034785(n)+A034785(n+1). [From R. J. Mathar, Jun 15 2009] EXAMPLE a(3) = 160 because 2^5 + 2^7 = 160. MATHEMATICA f[n_] := 2^Prime[n] + 2^Prime[n + 1]; Array[f, 18] (* Robert G. Wilson v *) Table[2^Prime[n] + 2^Prime[n + 1], {n, 1, 18}] - Stefan Steinerberger, Apr 12 2008 CROSSREFS Cf. A000040, A001043. Sequence in context: A033586 A211786 A180093 * A222806 A114072 A218712 Adjacent sequences:  A137386 A137387 A137388 * A137390 A137391 A137392 KEYWORD nonn AUTHOR Max Sills, Apr 10 2008 EXTENSIONS More terms from N. J. A. Sloane, Apr 10 2008 STATUS approved

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