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, 1, 1), (0, 0, 1), (1, 0, -1), (1, 1, -1)}.
A148854
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, 1, 1), (0, 0, 1), (1, 0, -1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =8a(4) =28a(5) =91a(6) =353a(7) =1313a(8) =5279a(9) =21233a(10) =87974a(11) =369069a(12) =1572716a(13) =6763787a(14) =29462557a(15) =129147912a(16) =571417218a(17) =2543626341a(18) =11393262275a(19) =51321889995a(20) =232283468959
External references
- oeis: A148854