38516678domain: NAppears in sequencesa(n) = 3*a(n-1) - 2*a(n-2) + a(n-3).at n=20A137531Transform of the finite sequence (1, 0, -1) by the T_{0,0} transformation.at n=22A159347a(n) = a(n-1) + a(n-2) + a(n-4), with a(1)=1, a(2)=1, a(3)=3, a(4)=6.at n=31A259968