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), (0, 1, 1), (1, 0, 1), (1, 1, -1)}.
A150659
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), (0, 1, 1), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =28a(4) =122a(5) =534a(6) =2444a(7) =11220a(8) =52536a(9) =246840a(10) =1172104a(11) =5580649a(12) =26741260a(13) =128421666a(14) =619275234a(15) =2991804319a(16) =14494707351a(17) =70332745402a(18) =341974970533
External references
- oeis: A150659