1,1

The sequence (together with A194674) characterizes a right-left symmetry in the distribution of primes over intervals (2*p_n, 2*p_(n+1)), n=1,2,..., where p_n is the n-th prime.

Table of n, a(n) for n=1..84.

Cf. A104272, A080359, A193507, A194186, A164368, A194598, A194658, A194659, A194674, A164288, A164294.

Sequence in context: A115009 A151944 A073094 * A057606 A021385 A085193

Adjacent sequences: A194950 A194951 A194952 * A194954 A194955 A194956

nonn

Vladimir Shevelev, Sep 06 2011

approved