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%I #15 Aug 12 2023 23:01:48
%S 4,5,14,15,24,25,34,35,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,
%T 55,56,57,58,59,64,65,74,75,84,85,94,95,104,105,114,115,124,125,134,
%U 135,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158
%N Numbers whose American English name contains the letter 'f'.
%H Paolo Xausa, <a href="/A008540/b008540.txt">Table of n, a(n) for n = 1..10000</a>
%t A008540Q[n_]:=StringContainsQ[IntegerName[n,"Words"],"f"];Select[Range[0,200],A008540Q] (* _Paolo Xausa_, Aug 12 2023 *)
%Y Cf. A008519 (o), A008520 (e), A008522 (t), A008536 (n), A008538 (s), A008553 (y).
%K nonn,word
%O 1,1
%A _N. J. A. Sloane_
%E Name edited by _Paolo Xausa_, Aug 12 2023