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, 0, 0), (-1, 0, 1), (0, -1, 1), (1, 1, -1), (1, 1, 0)}.
A149450
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, 0, 0), (-1, 0, 1), (0, -1, 1), (1, 1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =13a(4) =48a(5) =201a(6) =833a(7) =3542a(8) =15821a(9) =70613a(10) =318216a(11) =1470558a(12) =6792471a(13) =31562812a(14) =148689655a(15) =700679773a(16) =3314455876a(17) =15809629067a(18) =75452486735a(19) =361036238129
External references
- oeis: A149450