Annual Appeal: Please make a donation (tax deductible in USA) to keep the OEIS running. Over 4500 articles have referenced us, often saying "we would not have discovered this result without the OEIS".
Table of n, a(n) for n=0..68.
Cf. A004086, A030101-A030108, A056960-A056963.
Sequence in context: A010881 A190600 A053832 * A043271 A062759 A121758
Adjacent sequences: A056958 A056959 A056960 * A056962 A056963 A056964
Henry Bottomley, Jul 18 2000