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A092733 Sum of two consecutive primes of the form 2^x+1 (including Fermat primes and 2). 0
5, 8, 22, 274, 65794 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
EXAMPLE
a(1) = [2^0+1] + [2^(2^0)+1]
a(2) = [2^(2^0)+1] + [2^(2^1)+1]
a(3) = [2^(2^1)+1] + [2^(2^2)+1]
a(4) = [2^(2^2)+1] + [2^(2^3)+1]
a(5) = [2^(2^3)+1] + [2^(2^4)+1]
MATHEMATICA
Total/@Partition[Select[2^Range[0, 50]+1, PrimeQ], 2, 1] (* Harvey P. Dale, Jun 21 2021 *)
CROSSREFS
Sequence in context: A120042 A120043 A063897 * A116884 A192651 A105963
KEYWORD
nonn,more
AUTHOR
Jorge Coveiro, Apr 12 2004
EXTENSIONS
Offset corrected by Arkadiusz Wesolowski, Oct 22 2011
STATUS
approved

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Last modified March 29 01:36 EDT 2024. Contains 371264 sequences. (Running on oeis4.)