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".
See A188014, A188034.
Table of n, a(n) for n=1..79.
Cf. A188014, A188034, A188035.
Sequence in context: A219666 A026340 A018717 * A090909 A001950 A022841
Adjacent sequences: A188033 A188034 A188035 * A188037 A188038 A188039
Clark Kimberling, Mar 19 2011