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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

Table of n, a(n) for n=1..5.

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

Cf. A092506, A019434, A063897.

Sequence in context: A120042 A120043 A063897 * A116884 A192651 A105963

Adjacent sequences: A092730 A092731 A092732 * A092734 A092735 A092736

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 December 9 23:05 EST 2022. Contains 358710 sequences. (Running on oeis4.)