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), (-1, 1, 1), (1, 0, 1), (1, 1, -1), (1, 1, 1)}.
A150980
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), (-1, 1, 1), (1, 0, 1), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =36a(4) =172a(5) =764a(6) =3738a(7) =17394a(8) =85969a(9) =409193a(10) =2032180a(11) =9802215a(12) =48810329a(13) =237464514a(14) =1184244681a(15) =5795208834a(16) =28927219072a(17) =142152883742a(18) =709968042801
External references
- oeis: A150980