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What is the next number in this series?

Look at the series (10, 9, 17, 50, 199, ?), determine the pattern, and find the value of the next number!

Correct answers: 85

The first user who solved this task is Djordje Timotijevic.

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Heinrich Anton de Bary

Died 19 Jan 1888 at age 56 (born 26 Jan 1831). German botanist known as a founder of modern mycology and plant pathology for his research into the roles of fungi and other agents in causing plant diseases. He determined the life cycles of many fungi, for which he developed a classification that has been retained in large part by modern mycologists. Among the first to study host-parasite interactions, and ways in which fungi penetrate host tissues, in 1853, he asserted that rust and smut were fungal diseases. In 1865 he proved that the life cycle of wheat rust involves two hosts, wheat and barberry. De Bary was the first to show (1866) that lichens consist of a fungus and an alga in intimate association. He coined the term symbiosis (1879) for the mutually beneficial partnership between two organisms.

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