2,2
p[(p[n]+1)/2]- p[(p[n]-1)/2]
Cf. A104293, A104294.
Sequence in context: A005859 A166271 A134318 * A172068 A008331 A173388
Adjacent sequences: A104292 A104293 A104294 * A104296 A104297 A104298
easy,nonn
Zak Seidov (zakseidov(AT)yahoo.com), Feb 28 2005