Fransén-Robinson constant

Etymology
Named after mathematicians Arne Fransén and Herman P. Robinson.

Proper noun

 * 1)  The numeric value of the integral over the positive real numbers of the reciprocal of the gamma function, $$\textstyle F=\int_0^\infty \frac 1 {\Gamma(x)} dx = 2.8077702420285...$$.

Translations

 * French: constante de Fransén-Robinson
 * German: Fransén–Robinson-Konstante
 * Swedish: Fransén–Robinsons konstant