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A001161 Numbers containing an even number of letters. 2

%I

%S 0,4,5,9,11,12,13,14,18,19,20,24,25,29,30,34,35,39,41,42,43,46,47,48,

%T 51,52,53,56,57,58,61,62,63,66,67,68,71,72,73,76,77,78,80,84,85,89,90,

%U 94,95,99

%N Numbers containing an even number of letters.

%Y Cf. A005589, complement of A001162.

%K nonn,word

%O 1,2

%A William P. Everts [ bille(AT)regenisys.com ]

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Last modified September 18 13:51 EDT 2021. Contains 347527 sequences. (Running on oeis4.)