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, 1, 1), (0, 1, -1), (1, 0, 0)}.
A148238
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, 1, 1), (0, 1, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =13a(5) =36a(6) =105a(7) =330a(8) =1078a(9) =3638a(10) =11933a(11) =41912a(12) =145901a(13) =516793a(14) =1826389a(15) =6645738a(16) =24228599a(17) =88225915a(18) =325337560a(19) =1210496127a(20) =4526332777a(21) =16879854659a(22) =63732233744a(23) =241458420405a(24) =916751073403
External references
- oeis: A148238