3
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Here's a curious sequence of letters:

H H H E L I P O A
L S C S E C S A C

But one of the letters is wrong! Can you figure out which letter is wrong, and what the sequence represents?

(note: two lines used for sequence are simply for the sake of keeping it neat, the newline is not part of the puzzle)

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    $\begingroup$ Looked like the periodic table elements :( $\endgroup$ – thepace May 8 '15 at 15:25
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The answer is:

P should be B.

The sequence represents

The periodic table overlayed with the Fibonacci sequence. H = 1, H = 1, He = 2, Li = 3, B = 5, O = 8, Al = 13...

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  • $\begingroup$ @mmking That got me for a bit until I realized the line wrapped around. $\endgroup$ – tfitzger May 8 '15 at 15:36
  • $\begingroup$ Damn it I was so close! $\endgroup$ – Daedric May 8 '15 at 15:40
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    $\begingroup$ Well done. And @tfitzger, I didn't explicitly put the newline in to cause that confusion, but I certainly welcomed it - it made it just a little harder to spot the pattern. $\endgroup$ – Glen O May 8 '15 at 15:47
  • $\begingroup$ @GlenO I figured as such. $\endgroup$ – tfitzger May 8 '15 at 15:51

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