perplexus.info :: Sequences : The enigmatic one

The enigmatic one (Posted on 2015-06-30)

1, 4, 3, 11, 15, 13, ?, ?, ?, ?, X, ...

The four integers after 13 are well defined, the 5th might be controversial.

Please comment.

Submitted by Ady TZIDON

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Solution: (Hide)

A001166 in OEIS.
Smallest natural number requiring n letters in English,starts with "one" (3 letters).

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	Subject	Author	Date
	spoiler: Official solution	Ady TZIDON	2015-09-01 23:29:51

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