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, 0, 0), (0, -1, 1), (0, 1, 0), (1, 0, -1), (1, 1, -1)}.
A148358
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, 0, 0), (0, -1, 1), (0, 1, 0), (1, 0, -1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =15a(5) =45a(6) =151a(7) =523a(8) =1881a(9) =6965a(10) =26487a(11) =102601a(12) =404609a(13) =1619963a(14) =6568854a(15) =26939533a(16) =111602913a(17) =466477951a(18) =1965296691a(19) =8339774230a(20) =35620899135a(21) =153043448404a(22) =661093944092
External references
- oeis: A148358