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A192295
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Number of distinct consonants in the English name of n.
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1
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2, 1, 2, 3, 2, 2, 2, 3, 3, 1, 2, 3, 4, 4, 4, 3, 4, 4, 4, 2, 4, 4, 4, 6, 6, 6, 6, 6, 6, 4, 4, 5, 5, 4, 5, 6, 6, 7, 5, 5, 4, 5, 5, 5, 4, 5, 6, 7, 6, 5, 3, 4, 4, 5, 4, 4, 5, 6, 5, 4, 4, 5, 5, 6, 6, 6, 4, 6, 6, 5, 5, 5, 6, 7, 7, 6, 6, 5, 7, 5, 4, 5, 5, 5, 6, 6, 6, 7, 4, 5, 3, 3, 4, 5, 5, 5, 5, 5, 5, 3, 4, 4, 6, 5, 5
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OFFSET
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0,1
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COMMENTS
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First differs from A037195 at the ninth term.
The letter "y" is here considered a consonant regardless of its usage in the word(s).
The maximum number of distinct vowels that can occur in the English name of n is 5, which occurs for n in A058179. - Jonathan Vos Post, Jul 12 2011
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LINKS
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EXAMPLE
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a(13) = 4 because the distinct consonants present in THIRTEEN are T, H, R and N.
a(9) = 1 because N is the only consonant present in NINE.
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MATHEMATICA
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Array[Length@ Union@ Select[Characters@ IntegerName@ #, And[LetterQ@ #, FreeQ[{97, 101, 105, 111, 117}, ToCharacterCode[#][[1]]]] &] &, 105, 0] (* Michael De Vlieger, Feb 15 2020 *)
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CROSSREFS
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Cf. A037195, A037196 (number of vowels in n), A058179 (numbers whose English names include all five vowels at least once).
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KEYWORD
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dumb,easy,nonn,word
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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