A122157 Number of primes between two successive numbers congruent to {2, 4} mod 6.

2, 2, 0, 2, 0, 2, 0, 1, 0, 2, 0, 1, 0, 2, 0, 1, 0, 1, 0, 2, 0, 1, 0, 2, 0, 1, 0, 1, 0, 1, 0, 1, 0, 2, 0, 1, 0, 1, 0, 0, 0, 1, 0, 1, 0, 2, 0, 0, 0, 2, 0, 1, 0, 1, 0, 1, 0, 1, 0, 2, 0, 0, 0, 2, 0, 2, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0, 1, 0, 2, 0, 2, 0, 0, 1, 0, 1

Offset

1,1

Comments

Except for twin primes, there are 2n numbers congruent to {2, 4} mod 6 between two consecutive primes

a(n) = 2 iff there are twin primes between two numbers congruent to {2, 4} mod 6.

Links

Table of n, a(n) for n=1..87.

Crossrefs

Sequence in context: A362634 A050314 A316344 * A080378 A243865 A120439

Adjacent sequences: A122154 A122155 A122156 * A122158 A122159 A122160

Keyword

easy,nonn

Author

Giovanni Teofilatto, Oct 29 2006, corrected Nov 01 2006

Status

approved