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), (0, 1, 1), (1, -1, -1)}.
A148537
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), (0, 1, 1), (1, -1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =5a(4) =19a(5) =45a(6) =161a(7) =457a(8) =1571a(9) =5133a(10) =17539a(11) =60615a(12) =210997a(13) =744557a(14) =2682465a(15) =9596691a(16) =35214755a(17) =128039943a(18) =473335939a(19) =1758472503a(20) =6539815607a(21) =24610987311a(22) =92318357155a(23) =349482079913
External references
- oeis: A148537