a(n) is the left term in M^n * [1 0 0], M = the 3 X 3 matrix [1 -1 0 / -1 3 -2 / 0 -2 2].
A094433
a(n) is the left term in M^n * [1 0 0], M = the 3 X 3 matrix [1 -1 0 / -1 3 -2 / 0 -2 2].
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =24a(5) =108a(6) =504a(7) =2376a(8) =11232a(9) =53136a(10) =251424a(11) =1189728a(12) =5629824a(13) =26640576a(14) =126064512a(15) =596543616a(16) =2822874624a(17) =13357986048a(18) =63210668544a(19) =299116094976
External references
- oeis: A094433