**Number of irreducible words of length 2n in the free group with generators x,y such that the total degree of x and the total degree of y both equal zero.**

*1, 0, 8, 40, 312, 2240, 17280, 134568, 1071000, 8627872, 70302888, 577920200*

*7 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

*Tue Sep 7 11:00:42 CEST 2010* [seqfan] Re: A007987 ? was Re: Re: Number of solutions of a*b + c*d + ... + y*z = 0 (mod n)

*Tue Sep 7 03:17:01 CEST 2010* [seqfan] A007987 ? was Re: Re: Number of solutions of a*b + c*d + ... + y*z = 0 (mod n)

Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword

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