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, 1), (-1, 1, 0), (1, 0, 0), (1, 0, 1)}.
A150031
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, 1), (-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) =12327a(9) =46607a(10) =197833a(11) =754220a(12) =3343667a(13) =13318517a(14) =58434940a(15) =233005648a(16) =1052872124a(17) =4322695836a(18) =19330561228a(19) =79239584849a(20) =362301103486
External references
- oeis: A150031