From Leonard David at LiveScience:

The idea is that mathematics is as much a part of our humanity as music and art. And it is mathematics that might be understandable — even familiar — to extraterrestrial civilizations, allowing us to strike up star-speak repartee.

Carl DeVito, an emeritus faculty in the mathematics department at the University of Arizona in Tucson, has proposed a language based on plausibly universal scientific concepts. He recently detailed his work at the Astrobiology Science Conference 2017, held from April 24 to April 28 in Mesa, Arizona. [13 Ways to Hunt Intelligent Alien Life]

Designing a signal that attracts attention and, on examination, is “clearly” the work of intelligence, is a complex problem, DeVito told Space.com. To explore the possibilities, he authored “Science, SETI, and Mathematics” (Berghahn Books, 2014).

More.

We did not pay these people to play our song.

*See also:* Data basic: An introduction to information theory