Mathematics – Combinatorics
Scientific paper
2006-11-15
Mathematics
Combinatorics
Scientific paper
A recursively palindromic (RP) word is one that is a palindrome and whose
left half-word and right half-word are each RP. Thus ABACABA is, and MADAM is
not, an RP word. We count RP words of given length over a finite alphabet and
RP compositions of an integer. We use the same method to determine the parity
of the Catalan numbers.
Ji Kathy Q.
Wilf Herbert S.
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