1,2
Table of n, a(n) for n=1..4.
Cf. A060843, A028444.
Sequence in context: A326804 A000754 A317974 * A331834 A135373 A338695
Adjacent sequences: A119680 A119681 A119682 * A119684 A119685 A119686
hard,nonn
Christian Hercher (ch(AT)wurzel.org), Jun 08 2006
approved