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ABCDEABCDE is one (Posted on 2006-05-17) Difficulty: 2 of 5
How many arrangements of the letters AABBCCDDEE are there such that there are no double letters in the sequence?

See The Solution Submitted by Jer    
Rating: 4.5000 (2 votes)

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  Subject Author Date
Found this in the OEISBrian Smith2017-01-15 11:37:44
Solutioncomputer solution (spoiler) and hint for analytic solutionCharlie2006-05-17 10:35:45
Some ThoughtsSolution (?)Dej Mar2006-05-17 10:06:49
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