[seqfan] Re: A000108(n) ≡ 1 (mod 6)

[Robert G. Wilson v]

I have tested the conjecture up to 250000 and found no other terms except for 0, 1 & 31. Bob

-----Original Message-----
From: SeqFan [mailto:seqfan-bounces at list.seqfan.eu] On Behalf Of Vladimir Reshetnikov
Sent: Friday, November 06, 2015 5:17 PM
To: seqfan at seqfan.eu
Subject: [seqfan] A000108(n) ≡ 1 (mod 6)

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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