A192295 Number of distinct consonants in the English name of n.

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

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: A131810 A365143 A233519 * A037195 A271319 A367404

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