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, -1), (-1, -1, 0), (-1, 0, 0), (0, 1, -1), (1, 0, 1)}.
A148772
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, -1), (-1, -1, 0), (-1, 0, 0), (0, 1, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =8a(4) =22a(5) =80a(6) =249a(7) =856a(8) =3192a(9) =10985a(10) =41536a(11) =155873a(12) =576077a(13) =2259396a(14) =8615836a(15) =33421793a(16) =132726991a(17) =517346484a(18) =2066304258a(19) =8264179261a(20) =32924752702a(21) =133558734601a(22) =538585757755
External references
- oeis: A148772