1,2
Table of n, a(n) for n=1..12.
Erich Friedman, Problem of the month September 2002
Cf. A198514, A198515.
Sequence in context: A220178 A023832 A080235 * A187326 A056907 A039799
Adjacent sequences: A198513 A198514 A198515 * A198517 A198518 A198519
nonn,more
Kausthub Gudipati, Oct 26 2011
approved