94663domain: NAppears in sequencesa(n) = (n/3 + 7/9)*2^(n - 1) + (-1)^n/9.at n=14A127984Expansion of 1 / ( (1+x)*(2*x+1)*(-1+2*x)^2 ).at n=14A140787a(n) = (A135318(3*n) + A135318(3*n+1) + A135318(3*n+2))/3.at n=11A379530