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, 0), (0, 0, 1), (0, 1, -1), (1, 1, -1)}.
A148814
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, 0), (0, 0, 1), (0, 1, -1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =8a(4) =26a(5) =87a(6) =308a(7) =1129a(8) =4258a(9) =16401a(10) =64399a(11) =256816a(12) =1037571a(13) =4239492a(14) =17496610a(15) =72839052a(16) =305557831a(17) =1290667314a(18) =5485660832a(19) =23445450636a(20) =100712243095a(21) =434628533918
External references
- oeis: A148814