Let M = {{0, -1, 2}, {-1, 2, -1}, {2, -1, 0}}; v[1] = {0, 0, 1}; v[n] = M.v[n - 1]; then a(n) = v[n][[1]].

A124026

Let M = {{0, -1, 2}, {-1, 2, -1}, {2, -1, 0}}; v[1] = {0, 0, 1}; v[n] = M.v[n - 1]; then a(n) = v[n][[1]].

Terms

    a(0) =0a(1) =2a(2) =1a(3) =14a(4) =26a(5) =132a(6) =364a(7) =1416a(8) =4488a(9) =16016a(10) =53296a(11) =184736a(12) =625184a(13) =2145600a(14) =7303360a(15) =24979584a(16) =85196928a(17) =291057920a(18) =993379072a(19) =3392317952a(20) =11580678656a(21) =39541748736a(22) =134998297600a(23) =460924372992

External references