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, 0, 1), (0, 1, 0), (1, 0, 0)}.
A149853
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, 0, 1), (0, 1, 0), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =13a(4) =35a(5) =104a(6) =318a(7) =1014a(8) =3256a(9) =10543a(10) =34937a(11) =116848a(12) =397242a(13) =1354804a(14) =4641335a(15) =16053619a(16) =55784113a(17) =195466771a(18) =686258063a(19) =2416219435a(20) =8551265471a(21) =30349165784a(22) =108247450688a(23) =386615499598
External references
- oeis: A149853