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), (0, 1, -1), (1, -1, 1), (1, 0, 0)}.
A148415
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), (0, 1, -1), (1, -1, 1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =17a(5) =61a(6) =229a(7) =905a(8) =3637a(9) =15030a(10) =63386a(11) =272276a(12) =1187268a(13) =5239511a(14) =23349563a(15) =104935694a(16) =475085078a(17) =2165031594a(18) =9924717432a(19) =45736336780a(20) =211759771698a(21) =984569348155
External references
- oeis: A148415