Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, -1), (-1, 1, 1), (1, 0, 0), (1, 0, 1)}.
A150029
Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, -1), (-1, 1, 1), (1, 0, 0), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =16a(4) =56a(5) =176a(6) =632a(7) =2080a(8) =7744a(9) =26752a(10) =100352a(11) =353024a(12) =1345280a(13) =4843008a(14) =18516864a(15) =67305984a(16) =259601408a(17) =956426240a(18) =3695605760a(19) =13696663552a(20) =53218287616a(21) =198990118912a(22) =774023897088
External references
- oeis: A150029