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, 0), (1, 0, -1), (1, 1, 0)}.
A150168
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, 0), (1, 0, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =20a(4) =75a(5) =297a(6) =1223a(7) =5178a(8) =22441a(9) =98884a(10) =442283a(11) =2000916a(12) =9142251a(13) =42116199a(14) =195395624a(15) =912044028a(16) =4279777216a(17) =20176137436a(18) =95507078481a(19) =453744740526
External references
- oeis: A150168