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A192295 Number of distinct consonants in the English name of n. 1
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

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

LINKS

Michael De Vlieger, Table of n, a(n) for n = 0..10000

EXAMPLE

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.

MATHEMATICA

Array[Length@ Union@ Select[Characters@ IntegerName@ #, And[LetterQ@ #, FreeQ[{97, 101, 105, 111, 117}, ToCharacterCode[#][[1]]]] &] &, 105, 0] (* Michael De Vlieger, Feb 15 2020 *)

CROSSREFS

Cf. A037195, A037196 (number of vowels in n), A058179 (numbers whose English names include all five vowels at least once).

Sequence in context: A067694 A131810 A233519 * A037195 A271319 A319178

Adjacent sequences:  A192292 A192293 A192294 * A192296 A192297 A192298

KEYWORD

dumb,easy,nonn,word

AUTHOR

Kausthub Gudipati, Jun 27 2011

EXTENSIONS

More terms from Michael De Vlieger, Feb 15 2020

STATUS

approved

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Last modified October 20 19:28 EDT 2020. Contains 337909 sequences. (Running on oeis4.)