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, 0), (0, 0, 1), (0, 1, -1), (0, 1, 1), (1, 0, 1)}.
A151168
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, 0), (0, 0, 1), (0, 1, -1), (0, 1, 1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =3a(2) =12a(3) =48a(4) =213a(5) =951a(6) =4359a(7) =20208a(8) =94758a(9) =447624a(10) =2127430a(11) =10163516a(12) =48750957a(13) =234641671a(14) =1132668361a(15) =5481238693a(16) =26582499057a(17) =129161103024a(18) =628628768670
External references
- oeis: A151168