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, -1), (-1, 0, 1), (1, 0, -1), (1, 1, 1)}.
A149563
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, -1), (-1, 0, 1), (1, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =13a(4) =59a(5) =197a(6) =915a(7) =3325a(8) =15733a(9) =60317a(10) =287687a(11) =1144801a(12) =5494191a(13) =22417979a(14) =108227567a(15) =449660789a(16) =2180772569a(17) =9191846055a(18) =44726277919a(19) =190745199811a(20) =930613377737
External references
- oeis: A149563