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A139133 A self-descriptive sequence: positions of consonants in "two, one, five, seven, nine, eleven, thirteen, fifteen, ...". 1

%I

%S 2,1,5,7,9,11,13,15,16,18,21,23,25,26,27,29,30,33,34,36,37,40,41,43,

%T 44,47,50,51,52,55,56,57,59,60,61,63,65,66,68,69,70,71,72,73,76,77,79,

%U 80,81,82,84,86,87,89,90,91,92,94,95,96,98,99

%N A self-descriptive sequence: positions of consonants in "two, one, five, seven, nine, eleven, thirteen, fifteen, ...".

%C If there is a choice, pick the smallest number (or word) that makes sense. Hyphens and spaces are ignored.

%D E. Angelini, "Jeux de suites", in Dossier Pour La Science, pp. 32-35, Volume 59 (Jeux math'), April/June 2008, Paris.

%Y See A019270 (a version involving vowels rather than consonants) for further information.

%Y For a French version of the "vowels" sequence see A139132.

%K nonn,word,easy

%O 1,1

%A _N. J. A. Sloane_

%E Edited by _N. J. A. Sloane_, Jan 04 2016 at the suggestion of _Eric Angelini_

%E More terms from _Sean A. Irvine_, Jan 06 2016

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Last modified September 18 19:30 EDT 2021. Contains 347534 sequences. (Running on oeis4.)