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, -1, 0), (1, -1, 1), (1, 1, -1), (1, 1, 1)}.
A149788
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, -1, 0), (1, -1, 1), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =19a(4) =83a(5) =353a(6) =1589a(7) =7145a(8) =32933a(9) =152447a(10) =714599a(11) =3361687a(12) =15928719a(13) =75738541a(14) =361870393a(15) =1733808857a(16) =8335129385a(17) =40163623975a(18) =194021262095a(19) =939043445935
External references
- oeis: A149788