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 A133650 for definition of early bird numbers of order n.
a(28) > 6*10^7. [From Donovan Johnson, Nov 06 2010]
Table of n, a(n) for n=1..27.
a(3) = A133651(1) = 212.
Cf. A116700 (early bird numbers), A133650 (early bird numbers of order 2), A133651 (early bird numbers of order 3).
Sequence in context: A238755 A159449 A090230 * A004058 A052178 A123902
Adjacent sequences: A133649 A133650 A133651 * A133653 A133654 A133655
Klaus Brockhaus, Sep 19 2007
a(16)-a(27) from Donovan Johnson, Nov 06 2010