1,2
Table of n, a(n) for n=1..17.
Eric Weisstein's World of Mathematics, Polyplet.
Cf. A030222.
Sequence in context: A026966 A026976 A026951 * A003499 A018953 A009199
Adjacent sequences: A030230 A030231 A030232 * A030234 A030235 A030236
nonn,hard
David W. Wilson
More terms from Joseph Myers, Sep 26 2002
approved