280003domain: NAppears in sequencesSum of all n-digit Perrin numbers.at n=4A133211Transform of the finite sequence (1, 0, -1, 0, 1) by the T_{1,0} transformation (see link).at n=15A159337a(n) is the number of odd-balanced unimodal sequences of weight 2n+2.at n=32A335768