0,3

Binomial transform of A008611.

a(n)=2(cos(pi*n/3)-sqrt(3)sin(pi*n/3)/3)/3+2^n/3+n*2^(n-1)/3; a(n)=2*A010892(n+1)/3+A000079(n)/3+A001787(n)/3.

Sequence in context: A099099 A074082 A097813 this_sequence A156616 A046209 A078774

Adjacent sequences: A093038 A093039 A093040 this_sequence A093042 A093043 A093044

easy,nonn

Paul Barry (pbarry(AT)wit.ie), Mar 18 2004