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A092244 Numbers n such that 2^n-th prime + 2^(n-1)-th prime + 1 is prime. 0
11, 73, 443, 1031, 2339, 11833, 56737, 122891, 5423669 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..9.

EXAMPLE

prime(2^2)+prime(2^1) + 1 = 11 = prime.

PROG

(PARI) f(n)= for(x=1, n, y=prime(2^x)+ prime(2^(x-1))+1; if(isprime(y), print1(y", ")))

CROSSREFS

Sequence in context: A226034 A217946 A163775 * A155634 A335828 A003367

Adjacent sequences:  A092241 A092242 A092243 * A092245 A092246 A092247

KEYWORD

hard,nonn

AUTHOR

Cino Hilliard, Feb 20 2004

STATUS

approved

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Last modified November 26 09:38 EST 2020. Contains 338639 sequences. (Running on oeis4.)