Genocchi number

From Wikipedia, the free encyclopedia

The Genocchi numbers are a sequence of integers, Gn that satisfy the relation

\frac{2t}{e^t+1}=\sum_{n=1}^{\infty} G_n\frac{t^n}{n!}.

The first few Genocchi numbers are 1, -1, 0, 1, 0, -3, 0, 17 (sequence A001469 in OEIS). Gn is 0 for odd n > 1.

It has been proven that -3 and 17 are the only prime Genocchi numbers.

[edit] References

Retrieved from "http://en.wikipedia.org../../../g/e/n/Genocchi_number.html"
In other languages