A095094 - OEIS

A095094

Number of A080114-primes in range ]2^n,2^(n+1)].

1, 2, 2, 2, 3, 4, 7, 10, 16, 30, 51, 88, 153, 277, 509, 905, 1660, 3079, 5535, 10234, 19053

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OFFSET

1,2

LINKS

FORMULA

a(n) = A036378(n) - A095095(n).

PROG

(PARI) is(p) = {if(!isprime(p), return(0)); my(s=0); for(i=1, (p-1)/2, if((s+=kronecker(i, p))<0, return(0))); 1; }

a(n) = sum(p=2^n+1, 2^(n+1), is(p)); \\ Jinyuan Wang, Jul 20 2020

CROSSREFS

KEYWORD

nonn,more

AUTHOR

STATUS

approved