Squares of the central trinomial coefficients (A002426).
1, 1, 9, 49, 361, 2601, 19881, 154449, 1225449, 9853321, 80156209, 658076409
5 seqfan posts
Tue Oct 25 17:56:49 CEST 2011 [seqfan] Re: automated discovery of unknown formulae
Tue Oct 25 17:56:49 CEST 2011 [seqfan] Re: automated discovery of unknown formulae
Tue Oct 25 17:37:28 CEST 2011 [seqfan] Re: automated discovery of unknown formulae
Tue Oct 25 17:37:28 CEST 2011 [seqfan] Re: automated discovery of unknown formulae
Tue Oct 25 15:58:20 CEST 2011 [seqfan] automated discovery of unknown formulae
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
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