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What number comes next?

Look at the series (2, 3, 6, 21, 231), determine the pattern, and find the value of the next number!

Correct answers: 56

The first user who solved this task is Slobodan Strelac.

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Heaven and Hell

A young woman came home and told her mom that her steady boyfriend had proposed, but she had turned him down because she found out he was an atheist, and didn't believe in Heaven or Hell. "Marry him anyway, honey. Between the two of us, we'll show him just how very wrong he is."

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Georg von Hevesy

Born 1 Aug 1885; died 5 Jul 1966 at age 80.Hungarian-Danish-Swedish chemist who was awarded the 1943 Nobel Prize for developing isotopic tracer techniques which enabled understanding of the chemical paths of life processes. For example, a radioactive isotope of phosphorus, prepared in solutions of sodium phosphate can be injected into animals and humans, and blood samples analysed. This show that the radio-phosphorus content in human blood falls after only 2 hours to just 2% of its original amount as it changes places with the phosphorus atoms within the tissues, organs and skeleton. He also discovered, with Dirk Coster, the element hafnium (1923). He published Adventures in Radioisotope Research in two volumes (1962).[EB and a NYT obituary give date of death 5 Jul 1966. DSB gives 6 Jul 1966.]

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