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), (0, 0, -1), (1, 0, 0), (1, 1, -1)}.
A148325
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), (0, 0, -1), (1, 0, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =14a(5) =41a(6) =137a(7) =459a(8) =1653a(9) =6053a(10) =22929a(11) =88744a(12) =350239a(13) =1405126a(14) =5726560a(15) =23602997a(16) =98536165a(17) =415093134a(18) =1765463633a(19) =7569222711a(20) =32689073839a(21) =142148086350a(22) =621856360143
External references
- oeis: A148325