1,2

Numerator of (A018252(n)/n).

Table of n, a(n) for n=1..50.

Sequence in context: A086364 A260662 A228044 * A260324 A157649 A155695

Adjacent sequences: A171526 A171527 A171528 * A171530 A171531 A171532

nonn,frac,easy

Jaroslav Krizek, Dec 11 2009

approved