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, 0, 1), (-1, 1, 0), (1, -1, 1), (1, 0, 0)}.
A148577
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, 0, 1), (-1, 1, 0), (1, -1, 1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =6a(4) =20a(5) =50a(6) =191a(7) =541a(8) =2177a(9) =6673a(10) =27348a(11) =88173a(12) =371217a(13) =1243274a(14) =5322458a(15) =18365142a(16) =79290736a(17) =279861757a(18) =1221272764a(19) =4392018743a(20) =19317981031a(21) =70580799383a(22) =311998052691
External references
- oeis: A148577