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, 1), (0, 1, -1), (1, -1, 1), (1, 1, 0)}.
A148955
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, 1), (0, 1, -1), (1, -1, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =9a(4) =30a(5) =104a(6) =374a(7) =1372a(8) =5121a(9) =19350a(10) =73820a(11) =283726a(12) =1097104a(13) =4262915a(14) =16630036a(15) =65090232a(16) =255470039a(17) =1005021759a(18) =3961596740a(19) =15642290396a(20) =61853211838a(21) =244889529931a(22) =970627733761
External references
- oeis: A148955