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, 0), (1, 0, 0), (1, 0, 1)}.
A150030
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, 0), (1, 0, 0), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =16a(4) =62a(5) =209a(6) =826a(7) =2884a(8) =12299a(9) =46495a(10) =197275a(11) =752364a(12) =3328340a(13) =13257631a(14) =58135717a(15) =231929737a(16) =1046257805a(17) =4296230064a(18) =19202622824a(19) =78758167294a(20) =359644608451
External references
- oeis: A150030