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, 0, 1), (0, 1, -1), (1, -1, 1)}.
A148152
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, 0, 1), (0, 1, -1), (1, -1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =11a(5) =30a(6) =93a(7) =297a(8) =971a(9) =3338a(10) =11610a(11) =41667a(12) =151870a(13) =560921a(14) =2109659a(15) =8004331a(16) =30762570a(17) =119322599a(18) =466458505a(19) =1840186572a(20) =7303994132a(21) =29192626506a(22) =117376023897a(23) =474341080495
External references
- oeis: A148152