cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

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A074043 Denominator of Sum_{k=1..n} 1/A077800(k), numerator=A074042.

Original entry on oeis.org

3, 15, 15, 105, 1155, 15015, 255255, 4849845, 140645505, 4360010655, 178760436855, 7686698784765, 453515228301135, 27664428926369235, 1964174453772215685, 143384735125371745005, 14481858247662546245505
Offset: 1

Views

Author

Reinhard Zumkeller, Aug 13 2002

Keywords

Comments

For n>2, a(n) = A048599(n-1).
A074042(n)/a(n) -> Brun's constant (A065421).

Crossrefs

Essentially the same as A048599.

Extensions

Edited by Max Alekseyev, May 10 2009
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