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, 0), (-1, 0, -1), (-1, 1, 1), (1, 0, 0)}.
A148066
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, 0), (-1, 0, -1), (-1, 1, 1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =3a(4) =12a(5) =25a(6) =87a(7) =189a(8) =760a(9) =1809a(10) =7305a(11) =18007a(12) =74346a(13) =189189a(14) =801954a(15) =2096447a(16) =8935024a(17) =23759693a(18) =102684825a(19) =277639875a(20) =1210611350a(21) =3316240457a(22) =14535629368a(23) =40233950255a(24) =177800903860a(25) =497069933555
External references
- oeis: A148066