1,5
Table of n, a(n) for n=1..6.
Eric Weisstein's World of Mathematics, Hi-Q
Sequence in context: A254801 A254808 A253817 * A247113 A186062 A258562
Adjacent sequences: A056745 A056746 A056747 * A056749 A056750 A056751
hard,nonn,more
David W. Wilson, Aug 15 2000
approved