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 A146755 Alliterative numbers: Positive integers n such that all words in n's name begin with the same letter; ignore numbers with one-word names. 2

%I #5 Jan 14 2021 20:01:40

%S 22,23,32,33,44,45,54,55,66,67,76,77,88,99,2000,2002,2003,2010,2012,

%T 2013,2020,2022,2023,2030,2032,2033,3000,3002,3003,3010,3012,3013,

%U 3020,3022,3023,3030,3032,3033,10000,10002,10003,10010,10012,10013,10020

%N Alliterative numbers: Positive integers n such that all words in n's name begin with the same letter; ignore numbers with one-word names.

%C Use (American if different) English. Names of these numbers then exhibit alliteration (as in poetry or literature), hence the suggested name. Hyphens connecting words and any use of the word "and" is ignored. If, for example, the normal "American System" (short scale with no "milliard", "billiard", etc.) with the suggested extension by reusable prefixes as developed and described by L. C. Noll (see link) is then used, this sequence is both well-defined and infinite.

%H Landon Curt Noll, <a href="http://www.isthe.com/chongo/tech/math/number/howhigh.html">The English Name of a Number</a>

%H Wikipedia, <a href="http://en.wikipedia.org/wiki/Names_of_large_numbers">Names of Large Numbers</a>

%e 22 is the first term because its English name, the compound word "twenty-two", is considered here to be two words and each word starts with the letter "t". 1555 is not a term because it is treated here as "one thousand five hundred fifty-five", not "fifteen fifty-five" as, for example, the year 1555 would be called.

%Y Cf. A051108.

%K nonn,word

%O 1,1

%A _Rick L. Shepherd_, Nov 01 2008

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Last modified December 9 13:48 EST 2023. Contains 367691 sequences. (Running on oeis4.)