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, 0, 0), (0, -1, 1), (0, 1, 0), (1, 0, -1)}.
A148109
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, 0, 0), (0, -1, 1), (0, 1, 0), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =10a(5) =28a(6) =79a(7) =240a(8) =747a(9) =2442a(10) =8122a(11) =27655a(12) =95774a(13) =338586a(14) =1214670a(15) =4409121a(16) =16185295a(17) =60075271a(18) =225336394a(19) =852030177a(20) =3245779122a(21) =12454403176a(22) =48137170525a(23) =187203702504a(24) =731955128196
External references
- oeis: A148109