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, 1, 0), (1, 0, -1), (1, 0, 1)}.
A150262
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, 1, 0), (1, 0, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =22a(4) =87a(5) =365a(6) =1570a(7) =6882a(8) =30754a(9) =138898a(10) =634681a(11) =2925118a(12) =13575075a(13) =63414859a(14) =297703187a(15) =1404068748a(16) =6648070472a(17) =31583912383a(18) =150515794310a(19) =719198068067
External references
- oeis: A150262