1,2

Table of n, a(n) for n=1..59.

3 is in the sequence because A014574(3)=12 is two thirds of 18 and 18 is also a twin prime average.

Sequence in context: A094110 A212649 A084535 * A185954 A051838 A076792

Adjacent sequences: A194424 A194425 A194426 * A194428 A194429 A194430

nonn

Juri-Stepan Gerasimov, Dec 02 2011

approved