[seqfan] A000108(n) ≡ 1 (mod 6)

Vladimir Reshetnikov v.reshetnikov at gmail.com
Fri Nov 6 23:17:06 CET 2015

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Dear Seqfans,

Is it true that there are only 2 Catalan numbers <http://oeis.org/A000108> of
the form 6*k+1 (i.e. congruent to 1 modulo 6), namely A000108(1) = 1
and A000108(31) = 14544636039226909?

--
Thanks
Vladimir

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