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A131969 First differences of A020806. 1

%I #8 Jan 01 2024 23:50:51

%S 3,-2,6,-3,2,-6,3,-2,6,-3,2,-6,3,-2,6,-3,2,-6,3,-2,6,-3,2,-6,3,-2,6,

%T -3,2,-6,3,-2,6,-3,2,-6,3,-2,6,-3,2,-6,3,-2,6,-3,2,-6,3,-2,6,-3,2,-6,

%U 3,-2,6,-3,2,-6,3,-2,6,-3,2,-6,3,-2,6,-3,2,-6,3,-2,6,-3,2,-6

%N First differences of A020806.

%F a(n)=11*(-1)^n/3-2*A010892(n)/3+7*A010892(n-1)/3, n>0. a(n+6)=a(n). G.f.: (3-2x+6x^2)/((1+x)(1-x+x^2)). [From _R. J. Mathar_, Oct 24 2008]

%K sign

%O 0,1

%A _Paul Curtz_, Oct 06 2007

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Last modified September 1 13:08 EDT 2024. Contains 375591 sequences. (Running on oeis4.)