1,2
Table of n, a(n) for n=1..6.
Sequence in context: A169667 A132902 A219321 * A104283 A003852 A003845
Adjacent sequences: A020473 A020474 A020475 * A020477 A020478 A020479
nonn
David W. Wilson
The size of elements in this sequence clearly prohibits an exhaustive search.
approved