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 A257043 Integers with the same first and last letter in their English name. 1

%I #42 Oct 31 2023 11:21:05

%S 19,28,38,81,83,85,89,97,102,122,132,142,152,162,172,182,192,208,228,

%T 238,248,258,268,278,288,298,308,328,338,348,358,368,378,388,398,801,

%U 803,805,809,812,821,823,825,829,831,833,835,839,841,843,845,849,851,853,855,859

%N Integers with the same first and last letter in their English name.

%C Used in a Weekend Edition Sunday Puzzle, Jul 19 2015. Puzzle idea from _Rodolfo Kurchan_.

%C Earlier, used in Only Connect in 2010 (series 3 episode 10). - _Michael Hamm_, Oct 28 2023

%H Michael S. Branicky, <a href="/A257043/b257043.txt">Table of n, a(n) for n = 1..10000</a>

%H Weekend Edition Sunday Puzzle, <a href="http://www.npr.org/2015/07/26/426205052">Sunday, Jul 26 2015</a>.

%e 19 starts and ends with 'n'. 28 and 38 have 't', 97 has 'n'.

%o (Python)

%o from num2words import num2words

%o def ok(n): s = num2words(n); return s[0] == s[-1]

%o print([k for k in range(860) if ok(k)]) # _Michael S. Branicky_, Apr 12 2022

%K nonn,easy,word

%O 1,1

%A _Chris Hibbert_, Jul 20 2015

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Last modified August 13 18:29 EDT 2024. Contains 375144 sequences. (Running on oeis4.)