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A165611 The number of n-digit non-papaya numbers. 4
0, 0, 648, 7128, 85536, 870750, 8937054, 89606088, 899190558, 8995054860, 89990100090, 899940633714, 8999883000108, 89999307063540, 899998650010008, 8999992080398088, 89999984700000144, 899999910900869040, 8999999829000000162, 89999999010004961988 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
COMMENTS
These are numbers that are neither palindromes nor concatenations of two palindromes. Three digit numbers that are non-papaya are numbers with all distinct digits. There are 9*9*8 of them: 648.
LINKS
Tanya Khovanova, Papaya Words and Numbers
FORMULA
a(n) = A052268(n) - A165135(n).
CROSSREFS
Sequence in context: A204392 A233677 A200938 * A282334 A034619 A185270
KEYWORD
base,nonn
AUTHOR
Tanya Khovanova, Sep 22 2009
EXTENSIONS
a(6)-a(20) from Andrew Howroyd, Mar 29 2016
STATUS
approved

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Last modified February 28 22:27 EST 2024. Contains 370400 sequences. (Running on oeis4.)