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A165610 The number of patterns of non-papaya words. 4
0, 0, 1, 5, 31, 153 (list; graph; refs; listen; history; internal format)
OFFSET

1,4

COMMENTS

Papaya words are defined as palindromes or concatenations of two palindromes. a(n) = A000110(n) - A165137(n).

LINKS

Tanya Khovanova, Papaya Words and Numbers [From Tanya Khovanova (tanyakh(AT)yahoo.com), Oct 01 2009]

EXAMPLE

The only three-character non-papaya pattern is abc - words with all distinct letters. Four-character non-papaya patterns are: aabc, abbc, abcc, abca, abcd.

CROSSREFS

A165137

A165135, A165136, A165137, A165611 [From Tanya Khovanova (tanyakh(AT)yahoo.com), Oct 01 2009]

Sequence in context: A077719 A005826 A047109 * A092496 A045904 A034353

Adjacent sequences:  A165607 A165608 A165609 * A165611 A165612 A165613

KEYWORD

more,nonn,uned,base

AUTHOR

Tanya Khovanova (tanyakh(AT)yahoo.com), Sep 22 2009

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Last modified February 12 18:02 EST 2012. Contains 205432 sequences.